Sherwen, S. L., & Hemsworth, P. H. (2019). The Visitor Effect on Zoo Animals: Implications and Opportunities for Zoo Animal Welfare. Animals (Basel).
استشهاد بنمط شيكاغوSherwen, Sally L., و Paul H. Hemsworth. "The Visitor Effect On Zoo Animals: Implications and Opportunities for Zoo Animal Welfare." Animals (Basel) 2019.
MLA استشهادSherwen, Sally L., و Paul H. Hemsworth. "The Visitor Effect On Zoo Animals: Implications and Opportunities for Zoo Animal Welfare." Animals (Basel) 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.