Cita APA (7a ed.)

Webb, R. G. North American Recent Soft-Shelled Turtles (Family Trionychidae).

Cita Chicago Style (17a ed.)

Webb, Robert G. North American Recent Soft-Shelled Turtles (Family Trionychidae).

Cita MLA (9a ed.)

Webb, Robert G. North American Recent Soft-Shelled Turtles (Family Trionychidae).