APA (7th ed.) Citation

Pettigrew, W. T. (2007). Potassium influence on crop yield and quality. Internat. Fert. Soc.

Chicago Style (17th ed.) Citation

Pettigrew, William T. Potassium Influence on Crop Yield and Quality. York, UK: Internat. Fert. Soc, 2007.

MLA (9th ed.) Citation

Pettigrew, William T. Potassium Influence on Crop Yield and Quality. Internat. Fert. Soc, 2007.

Warning: These citations may not always be 100% accurate.