APA (7th ed.) Citation

Collias, N. E., & Collias, E. C. (1976). External construction by animals. Dowden, Hutchinson & Ross.

Chicago Style (17th ed.) Citation

Collias, Nicholas E., and Elsie C. Collias. External Construction by Animals. Stroudsburg, Pa.: Dowden, Hutchinson & Ross, 1976.

MLA (8th ed.) Citation

Collias, Nicholas E., and Elsie C. Collias. External Construction by Animals. Dowden, Hutchinson & Ross, 1976.