Cita APA (7th ed.)

Walker, E. (1981). Doors to more mature reading: Detailed notes on adult books for use with young people (2nd ed.). American Library Association.

Cita Chicago (17th ed.)

Walker, Elinor. Doors to More Mature Reading: Detailed Notes on Adult Books for Use with Young People. 2nd ed. Chicago: American Library Association, 1981.

Cita MLA (9th ed.)

Walker, Elinor. Doors to More Mature Reading: Detailed Notes on Adult Books for Use with Young People. 2nd ed. American Library Association, 1981.