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↑  Erickson, Gregory M. & Tumanova, Tatyana A. (2000). Growth curve of Psittacosaurus mongoliensis Osborn (Ceratopsia: Psittacosauridae) inferred from long bone histology. Zoological Journal of the Linnean Society 130: 551–566.
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↑  "MSU, Mongolian paleontologists find 67 dinosaurs in one week Lưu trữ 2009-02-16 tại Wayback Machine" by Evelyn Boswell. Montana State University News Service. ngày 13 tháng 9 năm 2006. Truy cập ngày 5 tháng 5 năm 2007.
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↑  doi:10.1016/j.cretres.2006.05.011
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↑  Buffetaut, Eric & Suteethorn, Varavudh. (1992). A new species of the ornithischian dinosaur Psittacosaurus from the Early Cretaceous of Thailand. Palaeontology 35: 801–812.
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↑  Hai-Lu You, Kyo Tanoue & Peter Dodson. (2008). New data on cranial anatomy of the ceratopsian dinosaur Psittacosaurus major. Acta Palaeontologica Polonica 53(2):183–196.
So sánh kích thước loài P. mongoliensis với con người. Mỗi ô tương đương một mét.
Tám loài Psittacosaurus, vẽ theo tỷ lệ.
Mẫu gốc P. mongoliensis, Bảo tàng Lịch sử Tự nhiên Hoa Kỳ
Mẫu vật hộp sọ điển hình P. mongoliensis từ Osborn, 1923
Hộp sọ P. lujiatunensis
Phục dựng P. sibiricus