Parr, L. A., & Heintz, M. (2009). Facial expression recognition in rhesus monkeys, Macaca mulatta. Animal behaviour, 77(6), 1507-1513. https://doi.org/10.1016/j.anbehav.2009.02.024
Chicago Style (17th ed.) CitationParr, Lisa A., and Matthew Heintz. "Facial Expression Recognition in Rhesus Monkeys, Macaca Mulatta." Animal Behaviour 77, no. 6 (2009): 1507-1513. https://doi.org/10.1016/j.anbehav.2009.02.024.
MLA (9th ed.) CitationParr, Lisa A., and Matthew Heintz. "Facial Expression Recognition in Rhesus Monkeys, Macaca Mulatta." Animal Behaviour, vol. 77, no. 6, 2009, pp. 1507-1513, https://doi.org/10.1016/j.anbehav.2009.02.024.
Warning: These citations may not always be 100% accurate.