APA (7th ed.) Citation

Harris, F. S., & Stewart, G. (1930). The principles of agronomy (Rev. ed.). The Macmillan company.

Chicago Style (17th ed.) Citation

Harris, Franklin Stewart, and George Stewart. The Principles of Agronomy. Rev. ed. New York: The Macmillan company, 1930.

MLA (9th ed.) Citation

Harris, Franklin Stewart, and George Stewart. The Principles of Agronomy. Rev. ed. The Macmillan company, 1930.