Cita APA (7a ed.)

Kötz, H., & Flessner, A. (1997). European contract law. Clarendon.

Cita Chicago Style (17a ed.)

Kötz, Hein, y Axel Flessner. European Contract Law. Oxford: Clarendon, 1997.

Cita MLA (9a ed.)

Kötz, Hein, y Axel Flessner. European Contract Law. Clarendon, 1997.