APA (7th ed.) Citation

Walker, E. (1981). Doors to more mature reading (2nd ed.). American Library Association.

Chicago Style (17th ed.) Citation

Walker, Elinor. Doors to More Mature Reading. 2nd ed. Chicago: American Library Association, 1981.

MLA (9th ed.) Citation

Walker, Elinor. Doors to More Mature Reading. 2nd ed. American Library Association, 1981.