Santos, E. T. (1996). The Law on obligation and contract. International Academy of Management & Economics.
Chicago-referens (17:e uppl.)Santos, Emmanuel T. The Law on Obligation and Contract. Makati: International Academy of Management & Economics, 1996.
MLA-referens (9:e uppl.)Santos, Emmanuel T. The Law on Obligation and Contract. International Academy of Management & Economics, 1996.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.