Citazione Stile APA (7a Edizione)

Schefler, W. C. (1976). Biology: Principles and issues. Addison - Wesley.

Citazione stile Chigago Style (17a edizione)

Schefler, William C. Biology: Principles and Issues. Reading Mass: Addison - Wesley, 1976.

Citatione MLA (9a ed.)

Schefler, William C. Biology: Principles and Issues. Addison - Wesley, 1976.