Parsons, F. T. D. (1961). How to know the ferns: A guide to the names, haunts, and habits of our common ferns. Dover.
Cita Chicago Style (17a ed.)Parsons, Frances Theodore Dana. How to Know the Ferns: A Guide to the Names, Haunts, and Habits of Our Common Ferns. New York: Dover, 1961.
Cita MLA (9a ed.)Parsons, Frances Theodore Dana. How to Know the Ferns: A Guide to the Names, Haunts, and Habits of Our Common Ferns. Dover, 1961.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.