Cita APA (7a ed.)

Hartkamp, A., & Betlem, G. (1994). Towards a European civil code. Ars Aequi Libri.

Cita Chicago Style (17a ed.)

Hartkamp, A.S, y Gerrit Betlem. Towards a European Civil Code. Nijmegen: Ars Aequi Libri, 1994.

Cita MLA (9a ed.)

Hartkamp, A.S, y Gerrit Betlem. Towards a European Civil Code. Ars Aequi Libri, 1994.