APA

Honegger R. E., .Key to juvenile Erymnochelys, Peltocephalus and Podocnemis. : .

Chicago

Honegger René E, .Key to juvenile Erymnochelys, Peltocephalus and Podocnemis. : .

Harvard

Honegger R. E., .Key to juvenile Erymnochelys, Peltocephalus and Podocnemis. : .

MLA

Honegger René E, .: . .