APA (7th ed.) Citation

Duellman, W. E. A Taxonomic Study of the Middle American Snake, Pituophis deppei.

Chicago Style (17th ed.) Citation

Duellman, William Edward. A Taxonomic Study of the Middle American Snake, Pituophis Deppei.

MLA (9th ed.) Citation

Duellman, William Edward. A Taxonomic Study of the Middle American Snake, Pituophis Deppei.

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