Cita APA (7a ed.)

Walker,Lewis Wayne. (1974). The book of owls. Knopf,A.

Cita Chicago Style (17a ed.)

Walker,Lewis Wayne. The Book of Owls. New York - EEUU: Knopf,A, 1974.

Cita MLA (8a ed.)

Walker,Lewis Wayne. The Book of Owls. Knopf,A, 1974.