APA (7th ed.) Citation

Croker, R. A. (1991). Pioneer ecologist: The life and work of Victor Ernest Shelford 1877-1968. Smithsonian Institution Press.

Chicago Style (17th ed.) Citation

Croker, Robert A. Pioneer Ecologist: The Life and Work of Victor Ernest Shelford 1877-1968. Washington, D.C.: Smithsonian Institution Press, 1991.

MLA (9th ed.) Citation

Croker, Robert A. Pioneer Ecologist: The Life and Work of Victor Ernest Shelford 1877-1968. Smithsonian Institution Press, 1991.

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