Παραπομπή APA

Pratt, H. S. (1951). Manual of the common invertebrate animals. Blakiston.

Παραπομπή Chicago Style

Pratt, Henery Sherring. Manual of the Common Invertebrate Animals. Philadelphia: Blakiston, 1951.

Παραπομπή MLA

Pratt, Henery Sherring. Manual of the Common Invertebrate Animals. Blakiston, 1951.