Παραπομπή σε μορφή APA (7η εκδ.)

Knowles, R. (2012). 200 contractual problems and their solutions (3rd ed.). Wiley-Blackwell. https://doi.org/10.1002/9781118257050

Παραπομπή σε μορφή Chicago (17η εκδ.)

Knowles, Roger. 200 Contractual Problems and Their Solutions. 3rd ed. Chichester, U.K. ; Ames, Iowa: Wiley-Blackwell, 2012. https://doi.org/10.1002/9781118257050.

Παραπομπή σε μορφή MLA (8th εκδ.)

Knowles, Roger. 200 Contractual Problems and Their Solutions. 3rd ed. Wiley-Blackwell, 2012. https://doi.org/10.1002/9781118257050.