APA (7th ed.) Citation

Orr, R. T. (1977). The little-known pika. Macmillan.

Chicago Style (17th ed.) Citation

Orr, Robert T. The Little-known Pika. New York: Macmillan, 1977.

MLA (9th ed.) Citation

Orr, Robert T. The Little-known Pika. Macmillan, 1977.