APA (7th ed.) Citation

Cobb, B. (2005). A field guide to ferns and their related families: Northeastern and central North America (2nd ed.). Houghton Mifflin Co.

Chicago Style (17th ed.) Citation

Cobb, Boughton. A Field Guide to Ferns and Their Related Families: Northeastern and Central North America. 2nd ed. Boston: Houghton Mifflin Co, 2005.

MLA (9th ed.) Citation

Cobb, Boughton. A Field Guide to Ferns and Their Related Families: Northeastern and Central North America. 2nd ed. Houghton Mifflin Co, 2005.