APA (7th ed.) Citation
NULAND, D., & Schwartz, H. F. (1989). A visual description of the common bean plant four major growth periods.
Chicago Style (17th ed.) Citation
NULAND, D.S, and Howard F. Schwartz. A Visual Description of the Common Bean Plant Four Major Growth Periods. 1989.
MLA (9th ed.) Citation
NULAND, D.S, and Howard F. Schwartz. A Visual Description of the Common Bean Plant Four Major Growth Periods. 1989.
Warning: These citations may not always be 100% accurate.