Gaya APA

Copeland, L, O. (2001). Principles of seed science and technology edition 4 (cet.1). America: Kluwer Academic/Plenum Publishers.

Gaya MLA

Copeland, Lawrence, O. "Principles of seed science and technology edition 4". cet.1 America: Kluwer Academic/Plenum Publishers, 2001. Text.