Cita APA (7a ed.)

Koestler, A. (1973). The case of the midwife toad. Vintage Books.

Cita Chicago Style (17a ed.)

Koestler, Arthur. The Case of the Midwife Toad. New York: Vintage Books, 1973.

Cita MLA (9a ed.)

Koestler, Arthur. The Case of the Midwife Toad. Vintage Books, 1973.