Παραπομπή APA

Essig, . E. D. (1972). History of entomology. Hafner Press.

Παραπομπή Chicago Style

Essig, E D. History of Entomology. Newyork: Hafner Press, 1972.

Παραπομπή MLA

Essig, E D. History of Entomology. Hafner Press, 1972.