APA

Stiles F. G., .Geographical aspects of bird-flower coevolution, with particular reference to Central America. : .

Chicago

Stiles F Gary, .Geographical aspects of bird-flower coevolution, with particular reference to Central America. : .

Harvard

Stiles F. G., .Geographical aspects of bird-flower coevolution, with particular reference to Central America. : .

MLA

Stiles F Gary, .: . .