Παραπομπή APA

Ibbetson,, D. (1999). Historical introduction to the law of obligations (1.). OUP.

Παραπομπή Chicago Style

Ibbetson,, D.J. Historical Introduction to the Law of Obligations. 1. New Delhi: OUP, 1999.

Παραπομπή MLA

Ibbetson,, D.J. Historical Introduction to the Law of Obligations. 1. OUP, 1999.