APA

Birks Peter,, . (2005). Unjust enrichment. Oxford: Oxford University Press.

Chicago

Birks Peter,, . 2005. Unjust enrichment. Oxford: Oxford University Press.

Harvard

Birks Peter,, . (2005). Unjust enrichment. Oxford: Oxford University Press.

MLA

Birks Peter,, . Unjust enrichment. Oxford: Oxford University Press. 2005.