APA-referens (7:e uppl.)

Duxbury , R. (2013). Contract Law (2nd ed.). Sweet and Maxwell.

Chicago-referens (17:e uppl.)

Duxbury , Robert. Contract Law. 2nd ed. New Delhi: Sweet and Maxwell, 2013.

MLA-referens (9:e uppl.)

Duxbury , Robert. Contract Law. 2nd ed. Sweet and Maxwell, 2013.