APA

Defler T. R., .Some population characteristics of Callicebus torquatus lugens (<Humboldt, 1812>) (<primates: Cebidae>) in Eastern Colombia. : .

Chicago

Defler Thomas R, .Some population characteristics of Callicebus torquatus lugens (<Humboldt, 1812>) (<primates: Cebidae>) in Eastern Colombia. : .

Harvard

Defler T. R., .Some population characteristics of Callicebus torquatus lugens (<Humboldt, 1812>) (<primates: Cebidae>) in Eastern Colombia. : .

MLA

Defler Thomas R, .: . .