Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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