Cita APA

Parsons, F. T. (. D. (1961). How to know the ferns: A guide to the names, haunts, and habits of our common ferns. New York: Dover.

Citación estilo Chicago

Parsons, Frances Theodore (Smith) Dana. How to Know the Ferns: A Guide to the Names, Haunts, and Habits of Our Common Ferns. New York: Dover, 1961.

Cita MLA

Parsons, Frances Theodore (Smith) Dana. How to Know the Ferns: A Guide to the Names, Haunts, and Habits of Our Common Ferns. New York: Dover, 1961.