APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.