APA

Vanzolini P. E., .An aid to the identification of the South American species of Amphisbaena (Squamata, Amphisbaenidae). : .

Chicago

Vanzolini P E, .An aid to the identification of the South American species of Amphisbaena (Squamata, Amphisbaenidae). : .

Harvard

Vanzolini P. E., .An aid to the identification of the South American species of Amphisbaena (Squamata, Amphisbaenidae). : .

MLA

Vanzolini P E, .: . .