APA (7th ed.) Citation

Northen, H. T., & Northen, R. T. (1956). The complete book of greenhouse gardening. Ronald Press.

Chicago Style (17th ed.) Citation

Northen, Henry T., and Rebecca T. Northen. The Complete Book of Greenhouse Gardening. New York [u.a.]: Ronald Press, 1956.

MLA (9th ed.) Citation

Northen, Henry T., and Rebecca T. Northen. The Complete Book of Greenhouse Gardening. Ronald Press, 1956.