Crafting a reference page in APA seems difficult, but once you get accustomed to the process, you'll find that it's not that difficult. The two best websites I can recommend are Citation Machine and Purdue's Online Writing Lab (OWL). Citation Machine will help make sure that your citations are correct, and Purdue will provide you with many examples. It is important to gather all information about a source while you're doing your research. This will ensure that you have it all when you need to create the page.
That being said, the basics of an APA page are just like you would find in any style. Your reference page always comes at the end of your paper, so that your reader knows where to go if they want more information or to see where your information originated, and begins on a new page. You should write References on the top of this page (centered and not bold). The page should be double spaced- just like the rest of your paper.
Remember, if you cite a source in your paper, it must be listed in your Reference Page (and so if you include a source on your reference page, it must be cited somewhere in your paper). Citations should be listed alphabetically by the author's last name (which list always listed first in your citations.) If you look at the example below, it may help you visualize the page.
Cummings, J. N., Butler, B., & Kraut, R. (2002). The quality of online
social relationships. Communications of the ACM, 45(7), 103-108.
Hu, Y., Wood, J. F., Smith, V., & Westbrook, N. (2004). Friendships
through IM: Examining the relationship between instant messaging
and intimacy. Journal of Computer-Mediated Communication,
Underwood, H., & Findlay, B. (2004). Internet relationships and their
impact on primary relationships. Behaviour Change, 21(2), 127-140.
The hard way to do it is to buy a copy of the APA style manual. The easy way (based on my personal experience) is to get hold of a couple of articles that are published in APA style and just copy or imitate them. These could be found in a psychological journal, but probably not in a popular psychology magazine like "Psychology Today." You only have to learn a few things about indenting and what to capitalize and that sort of thing. Just studying a page of references printed in the APA style should be sufficient to learn everything you need to know for referencing books, articles, works with multiple authors (and there are plenty of them in psychology books and articles!), and miscellaneous references. That's the easy way. You need to pay close attention to such things as punctuation and capitalization, but it should not be a big problem if you are only doing one page in APA format. A lot of what we learn is learned by imitation.