Campbell,Jonathan A. (1998). Amphibians and reptiles of northern Guatemala,The Yucatan and Belize. Norman: University of Oklahoma.
استشهاد بنمط شيكاغوCampbell,Jonathan A. Amphibians and Reptiles of Northern Guatemala,The Yucatan and Belize. Norman: University of Oklahoma, 1998.
MLA استشهادCampbell,Jonathan A. Amphibians and Reptiles of Northern Guatemala,The Yucatan and Belize. Norman: University of Oklahoma, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.