Παραπομπή APA

Nitrogen nutrion and plant growth. (1999). Nitrogen nutrion and plant growth. Enfield, New Hampshire: Science.

Παραπομπή Chicago Style

Nitrogen nutrion and plant growth. Nitrogen Nutrion and Plant Growth. Enfield, New Hampshire: Science, 1999.

Παραπομπή MLA

Nitrogen nutrion and plant growth. Nitrogen Nutrion and Plant Growth. Enfield, New Hampshire: Science, 1999.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.