APA-referens

Bear, F. E. (1924). Soils and fertilizers (4.). John Wiley & Sons INC.

Chicago-stil citat

Bear, Firman E. Soils and Fertilizers. 4. U S A: John Wiley & Sons INC, 1924.

MLA-referens

Bear, Firman E. Soils and Fertilizers. 4. John Wiley & Sons INC, 1924.