APA

Kattan G. H., .Rarity and vulnerability: the birds of the cordillera Central of Colombia. : .

Chicago

Kattan Gustavo H, .Rarity and vulnerability: the birds of the cordillera Central of Colombia. : .

Harvard

Kattan G. H., .Rarity and vulnerability: the birds of the cordillera Central of Colombia. : .

MLA

Kattan Gustavo H, .: . .