Gilbert, P. W., Mathewson, R. F., Rall, D. P., & American Institute of Biological Sciences. (1967). Sharks, skates, and rays. Johns Hopkins Press.
Lua i Stíl Chicago (17ú heag.)Gilbert, Perry W., Robert F. Mathewson, David P. Rall, agus American Institute of Biological Sciences. Sharks, Skates, and Rays. Baltimore: Johns Hopkins Press, 1967.
Lua MLA (9ú heag.)Gilbert, Perry W., et al. Sharks, Skates, and Rays. Johns Hopkins Press, 1967.
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