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 (9a ed.)
Helfman, Gene S., y Bruce B. Collette. Fishes: The Animal Answer Guide. Johns Hopkins University Press, 2011.
Precaución: Estas citas no son 100% exactas.