Παραπομπή APA

Eisman, L. T. (1972). Biology and human progress (4.).

Παραπομπή Chicago Style

Eisman, Louis; Tanzer. Biology and Human Progress. 4. Prentice-Hall, Englewood Cliffs, 1972.

Παραπομπή MLA

Eisman, Louis; Tanzer. Biology and Human Progress. 4. 1972.