Cita APA (7th ed.)

Gardner, E. S. (1955). The case of the musical cow. Pocket Books.

Cita Chicago (17th ed.)

Gardner, Erle Stanley. The Case of the Musical Cow. Nueva York: Pocket Books, 1955.

Cita MLA (9th ed.)

Gardner, Erle Stanley. The Case of the Musical Cow. Pocket Books, 1955.