Gaya APA

h.t, U., k.usman, . (2003). PostgreSQL : a comprehensive guide to building, programming, and administering PostgreSQL databases (1st ed.). Indianapolis: Sams.

Gaya MLA

h.t, Ulfah., k.usman, . "PostgreSQL : a comprehensive guide to building, programming, and administering PostgreSQL databases". 1st ed. Indianapolis: Sams, 2003. Text.