Dyfyniad APA
Helfman, G. S., & Burgess, G. H. (2014). Sharks: The animal answer guide. John Hopkins University Press.
Dyfyniad Arddull Chicago
Helfman, Gene S., and George H. Burgess. Sharks: The Animal Answer Guide. Baltimore, Maryland: John Hopkins University Press, 2014.
Dyfyniad MLA
Helfman, Gene S., and George H. Burgess. Sharks: The Animal Answer Guide. John Hopkins University Press, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.