APA (7th ed.) Citation

Hawkes, J. G., & Hjerting, J. P. (1969). The potatoes of Argentina, Brazil, Paraguay, and Uruguay: A biosystematic study. Clarendon P..

Chicago Style (17th ed.) Citation

Hawkes, J. G., and J. P. Hjerting. The Potatoes of Argentina, Brazil, Paraguay, and Uruguay: A Biosystematic Study. Oxford: Clarendon P., 1969.

MLA (8th ed.) Citation

Hawkes, J. G., and J. P. Hjerting. The Potatoes of Argentina, Brazil, Paraguay, and Uruguay: A Biosystematic Study. Clarendon P., 1969.