APA (7. basım) Alıntı

De Leon, H. S. (1969). The law on obligations and contracts. s.n.

Chicago Style (17. basım) Atıf

De Leon, Hector S. The Law on Obligations and Contracts. [Manila: s.n, 1969.

MLA (9th ed.) Atıf

De Leon, Hector S. The Law on Obligations and Contracts. s.n, 1969.