Citazione Stile APA (7a Edizione)

Mayr, E., & Ashlock, P. D. (1991). Principles of systematic zoology (2nd ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Mayr, Ernst, e Peter D. Ashlock. Principles of Systematic Zoology. 2nd ed. New York: McGraw-Hill, 1991.

Citatione MLA (9a ed.)

Mayr, Ernst, e Peter D. Ashlock. Principles of Systematic Zoology. 2nd ed. McGraw-Hill, 1991.