Cita APA (7th ed.)

Morris, P. A. (1948). Boy's book of snakes, how to recognize and understand them. Ronald Press Co.

Cita Chicago (17th ed.)

Morris, Percy A. Boy's Book of Snakes, How to Recognize and Understand Them. New York: Ronald Press Co, 1948.

Cita MLA (9th ed.)

Morris, Percy A. Boy's Book of Snakes, How to Recognize and Understand Them. Ronald Press Co, 1948.