Cita APA (7th ed.)

Villanueva, R., & Excresa, A. L. (2012). Two-tiered wage system. DZUP.

Cita Chicago (17th ed.)

Villanueva, Raymund, i Anna Leah Excresa. Two-tiered Wage System. Quezon City: DZUP, 2012.

Cita MLA (9th ed.)

Villanueva, Raymund, i Anna Leah Excresa. Two-tiered Wage System. DZUP, 2012.