APA (7th ed.) Citation

Hsu, T. C., & Benirschke, K. (1973). Cystophora cristata (Hooded seal). Springer New York.

Chicago Style (17th ed.) Citation

Hsu, T. C., and Kurt Benirschke. Cystophora Cristata (Hooded Seal). Springer New York, 1973.

MLA (9th ed.) Citation

Hsu, T. C., and Kurt Benirschke. Cystophora Cristata (Hooded Seal). Springer New York, 1973.

Warning: These citations may not always be 100% accurate.