Cita APA (7a ed.)
Helfman, G. S., & Burgess, G. H. (2014). Sharks: The animal answer guide. John Hopkins University Press.
Cita Chicago Style (17a ed.)
Helfman, Gene S., y George H. Burgess. Sharks: The Animal Answer Guide. Baltimore, Maryland: John Hopkins University Press, 2014.
Cita MLA (9a ed.)
Helfman, Gene S., y George H. Burgess. Sharks: The Animal Answer Guide. John Hopkins University Press, 2014.
Precaución: Estas citas no son 100% exactas.