APA Citation

Haffer, J. H., & Borrero, J. I. (1965). On birds from northern Colombia. Universidad de Costa Rica.

Chicago Style Citation

Haffer, Jürgen H., and José I. Borrero. On Birds From Northern Colombia. Universidad de Costa Rica, 1965.

MLA Citation

Haffer, Jürgen H., and José I. Borrero. On Birds From Northern Colombia. Universidad de Costa Rica, 1965.

Warning: These citations may not always be 100% accurate.