Cobb, B. (1956). A field guide to the ferns and their related families of northeastern and central North America with a section on species also found in the British Isles and western Europe. Houghton Mifflin.
Chicago Style (17th ed.) CitationCobb, Boughton. A Field Guide to the Ferns and Their Related Families of Northeastern and Central North America with a Section on Species Also Found in the British Isles and Western Europe. Boston: Houghton Mifflin, 1956.
MLA (9th ed.) CitationCobb, Boughton. A Field Guide to the Ferns and Their Related Families of Northeastern and Central North America with a Section on Species Also Found in the British Isles and Western Europe. Houghton Mifflin, 1956.
Warning: These citations may not always be 100% accurate.