Bentley, Gerald Eades. “John Day.” In The Jacobean and Caroline Stage, Volume III: Plays and Playwrights, pp. 238-40. Oxford: At the Clarendon Press, 1956.
Provides a brief biography along with a bibliography of surviving works by Day.
Chambers, E. K. “John Day.” In The Elizabethan Stage, Vol. III, pp. 284-89. 1923. Reprint. Oxford: At the Clarendon Press, 1965.
Offers a descriptive primary bibliography. Includes a listing of lost plays by Day.
Borish, M. E. “A Second Version of John Day's Peregrinatio Scholastica.” Modern Language Notes 55, No. 1 (1940): 35-9.
Examines Day's differing dedications of two versions of his Peregrinatio Scholastica to separate patrons.
Golding, S. R. “The Parliament of Bees.” Review of English Studies 3 (1927): 280-304.
Argues that many characters from The Parliament of Bees are taken from The Noble Soldier, The Wonder of a Kingdom, and other plays.
Hutchings, Mark. “A Theatrical Allusion to The Revenger's Tragedy in 1607.” Notes and Queries, 46, No. 2, (June 1999): 246-48.
Finds in Day's Travels of the Three English Brothers references to Thomas Middleton's Revenger's Tragedy, proving that Middleton's play was likely first staged in 1606, earlier than had been estimated previously.
Additional coverage of Day's life and career is contained in the following source published by the Gale Group: Dictionary of Literary Biography, Vol. 62.