APA Edition Citation

PPI. (2005). North American and International Research Projects. Potash & Phosphate Institute.

Chicago Edition Citation

PPI. North American and International Research Projects. USA: Potash & Phosphate Institute, 2005.

MLA Edition Citation

PPI. North American and International Research Projects. Potash & Phosphate Institute, 2005.

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