APA ציטוט

(1980). The role of phosphorus in agriculture. Madison, Wis: American Society of Agronomy.

Trích dẫn kiểu Chicago

The Role of Phosphorus in Agriculture. Madison, Wis: American Society of Agronomy, 1980.

ציטוט MLA

The Role of Phosphorus in Agriculture. Madison, Wis: American Society of Agronomy, 1980.