Cita APA (7a ed.)

Kerr, J. G. (1950). A Naturalist in the Gran Chaco. University Press.

Cita Chicago Style (17a ed.)

Kerr, John Graham. A Naturalist in the Gran Chaco. Cambridge: University Press, 1950.

Cita MLA (9a ed.)

Kerr, John Graham. A Naturalist in the Gran Chaco. University Press, 1950.