APA (7th ed.) Citation

Zim, H. S., & Irving, J. G. (1949). Homing pigeons. William Morrow.

Chicago Style (17th ed.) Citation

Zim, Herbert Spencer, and James Gordon Irving. Homing Pigeons. New York: William Morrow, 1949.

MLA (9th ed.) Citation

Zim, Herbert Spencer, and James Gordon Irving. Homing Pigeons. William Morrow, 1949.