Should each place on a cite page be numbered?
According to the MLA (Modern Language Association) Handbook for Writers of Research Papers, you should NOT number the entries on a works cited page. You should alphabetize the entries, and indent the second and succeeding lines of each entry. If the entry starts with a title (when there's no author's name), you should ignore 'a', 'an' and 'the' and alphabetize by the first real word. For example, this should be alphabetized under 'I':
An Inconvenient Truth. Dir. Davis Guggenheim. Perf. Al Gore. Lawrence Bender, 2006.
Unfortunately the MLA Handbook is not available online, but there are several sites that have well-organized information based on the MLA Handbook. I have given you a link to one of these.
Some teachers may specify different formats, but the standard for MLA and APA works cited pages is for the works to not be numbered. They should be listed in alphabetical order, with a hanging indent.
You should not number your sources on a works cited (MLA) or reference page (APA). For a comprehensive guide to proper MLA formatting, refer to Joseph Gibaldi's MLA Handbook for Writers of Research Papers (6th or 7th Edition). For rules on APA citations, Concise Rules of APA Style by the American Psychological Association (2005) is a great reference. Depending on your academic program, I would definitely recommend one or both of these books. You will find them immensely useful throughout your academic career.
Yes. But make sure you put them in alphabetical order first, then number them.