APA način citiranja (7. izdanje)

Knowles, R. (2005). 150 contractual problems and their solutions. Blackwell Pub..

Čikaški stil citiranja (17. izdanje)

Knowles, Roger. 150 Contractual Problems and Their Solutions. Oxford ; Malden, MA: Blackwell Pub., 2005.

MLA način citiranja (9. izdanje)

Knowles, Roger. 150 Contractual Problems and Their Solutions. Blackwell Pub., 2005.