APA

Duellman W. E., .Ontogenetic polychromatism in marsupial frogs (<Anura: Hylidae>). : .

Chicago

Duellman William E, .Ontogenetic polychromatism in marsupial frogs (<Anura: Hylidae>). : .

Harvard

Duellman W. E., .Ontogenetic polychromatism in marsupial frogs (<Anura: Hylidae>). : .

MLA

Duellman William E, .: . .