Edwards, George. A Natural History of Uncommon Birds2. London: Printed for the author at the College of Physicians. 1747: 94 [2023-06-12]. (原始内容存档于2021-10-11) (英语).
Edwards, George. A Natural History of Uncommon Birds2. London: Printed for the author at the College of Physicians. 1747: 94 [2023-06-12]. (原始内容存档于2021-10-11) (英语).