Παραπομπή σε μορφή APA (7η εκδ.)

National Fertilizer Development Center (U.S.), American Society of Agronomy, & Hauck, R. D. (1984). Nitrogen in crop production: Proceedings of a symposium held 25-27 May 1982 at Sheffield, Alabama. American Society of Agronomy.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Fertilizer Development Center (U.S.), American Society of Agronomy, και Roland Daniel Hauck. Nitrogen in Crop Production: Proceedings of a Symposium Held 25-27 May 1982 at Sheffield, Alabama. Madison, Wis: American Society of Agronomy, 1984.

Παραπομπή σε μορφή MLA (9th εκδ.)

National Fertilizer Development Center (U.S.), et al. Nitrogen in Crop Production: Proceedings of a Symposium Held 25-27 May 1982 at Sheffield, Alabama. American Society of Agronomy, 1984.