APA (7th ed.) Citation

Unwin, C. W. J. (1926). Sweet peas: Their history, development, culture. D. Appleton and Company.

Chicago Style (17th ed.) Citation

Unwin, Charles W. J. Sweet Peas: Their History, Development, Culture. New York: D. Appleton and Company, 1926.

MLA (9th ed.) Citation

Unwin, Charles W. J. Sweet Peas: Their History, Development, Culture. D. Appleton and Company, 1926.