Παραπομπή APA

AHLGREN,Gilbert H. (1956). FORAGE CROPS (2.). McGRAW-HILL BOOK COMPANY,INC.

Παραπομπή Chicago Style

AHLGREN,Gilbert H. FORAGE CROPS. 2. NEW YORK: McGRAW-HILL BOOK COMPANY,INC, 1956.

Παραπομπή MLA

AHLGREN,Gilbert H. FORAGE CROPS. 2. McGRAW-HILL BOOK COMPANY,INC, 1956.