Cita APA (7a ed.)

Helfman, G. S., & Collette, B. B. (2011). Fishes: The animal answer guide. Johns Hopkins University Press.

Cita Chicago Style (17a ed.)

Helfman, Gene S., y Bruce B. Collette. Fishes: The Animal Answer Guide. Baltimore: Johns Hopkins University Press, 2011.

Cita MLA (8a ed.)

Helfman, Gene S., y Bruce B. Collette. Fishes: The Animal Answer Guide. Johns Hopkins University Press, 2011.