Template:MSW3 Perissodactyla
外观
Grubb, P. Order Perissodactyla. Wilson, D.E. & Reeder, D.M. (编). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore, Maryland: Johns Hopkins University Press. 2005: 629–636. ISBN 978-0-8018-8221-0. LCCN 2005001870. OCLC 62265494. NLC 001238428.