APA (7th ed.) Citation

Null, G., & Null, S. (1972). Herbs for the 'seventies ([First edition].). R. Speller.

Chicago Style (17th ed.) Citation

Null, Gary, and Steve Null. Herbs for the 'Seventies. [First edition]. New York: R. Speller, 1972.

MLA (9th ed.) Citation

Null, Gary, and Steve Null. Herbs for the 'Seventies. [First edition]. R. Speller, 1972.