APA (7th ed.) Citation

Wherry, E. T. (1961). The Fern guide: Northeastern and Midland United States and adjacent Canada. Doubleday.

Chicago Style (17th ed.) Citation

Wherry, Edgar T. The Fern Guide: Northeastern and Midland United States and Adjacent Canada. Garden City, New York: Doubleday, 1961.

MLA (9th ed.) Citation

Wherry, Edgar T. The Fern Guide: Northeastern and Midland United States and Adjacent Canada. Doubleday, 1961.