Pteridophyta

MLA

Pichi Sermolli, Rodolfo E. G, and W. B Turrill. Pteridophyta. New York: Pergamon Press, 1959.

APA

Pichi Sermolli, R. E. G, & Turrill, W. B. (1959). Pteridophyta. New York: Pergamon Press.

Chicago

Pichi Sermolli, Rodolfo E. G Pteridophyta. Edited by W. B Turrill. New York: Pergamon Press, 1959.