Παραπομπή APA

Villee, C. A. (1967). Biology (5th ed.). W B Saunders Publishers.

Παραπομπή Chicago Style

Villee, Claude A. Biology. 5th ed. Philadelphia: W B Saunders Publishers, 1967.

Παραπομπή MLA

Villee, Claude A. Biology. 5th ed. W B Saunders Publishers, 1967.