APA (7th ed.) Citation

Calkins, G. N. (2006). Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21: 415-468, 1901. Project Gutenberg.

Chicago Style (17th ed.) Citation

Calkins, Gary N. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21: 415-468, 1901. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Calkins, Gary N. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21: 415-468, 1901. Project Gutenberg, 2006.

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