Cita APA (7th ed.)
Johnson, L. G. (1983). Biology. W.C. Brown Co. Publishers.
Cita Chicago (17th ed.)
Johnson, Leland G. Biology. Dubuque, Iowa: W.C. Brown Co. Publishers, 1983.
Cita MLA (9th ed.)
Johnson, Leland G. Biology. W.C. Brown Co. Publishers, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.