Gaya APA

Bear, F. (1951). Hunger signs in crops : a symposium (1.Cet.4). Washington,D.C.: The American Society Of Agronomy and The National Fertilizer Association.

Gaya MLA

Bear, Firman. "Hunger signs in crops : a symposium". 1.Cet.4 Washington,D.C.: The American Society Of Agronomy and The National Fertilizer Association, 1951. Text.