Παραπομπή APA

T Nagendra Rao & K N Tiwari. (2002). Use of potassium in Kerala agriculture. Potash & Phosphate Institute of Canada-India Programme.

Παραπομπή Chicago Style

T Nagendra Rao και K N Tiwari. Use of Potassium in Kerala Agriculture. Hyderabad: Potash & Phosphate Institute of Canada-India Programme, 2002.

Παραπομπή MLA

T Nagendra Rao και K N Tiwari. Use of Potassium in Kerala Agriculture. Potash & Phosphate Institute of Canada-India Programme, 2002.