Instituto Internacional de la Potasa. Potash Institute: Potassium research review and trends.
Cita Chicago (17th ed.)Instituto Internacional de la Potasa. Potash Institute: Potassium Research Review and Trends.
Cita MLA (8th ed.)Instituto Internacional de la Potasa. Potash Institute: Potassium Research Review and Trends.
Atenció: Aquestes cites poden no estar 100% correctes.