Perry, D. R. (1983). Access methods, observations, pollination biology, bee foraging behavior, and bee community structure within a neotropical wet forest canopy. University Microfilms International.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Perry, Donald R. Access Methods, Observations, Pollination Biology, Bee Foraging Behavior, and Bee Community Structure Within a Neotropical Wet Forest Canopy. Ann Arbor, Mich.: University Microfilms International, 1983.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Perry, Donald R. Access Methods, Observations, Pollination Biology, Bee Foraging Behavior, and Bee Community Structure Within a Neotropical Wet Forest Canopy. University Microfilms International, 1983.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.