APA (7th ed.) Citation

Nichols, D. (1966). Echinoderms (2nd impression (revised ed.).). Hutchinson.

Chicago Style (17th ed.) Citation

Nichols, David. Echinoderms. 2nd impression (revised ed.). London: Hutchinson, 1966.

MLA (9th ed.) Citation

Nichols, David. Echinoderms. 2nd impression (revised ed.). Hutchinson, 1966.

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