Cita APA (7th ed.)

Estupigan, R. (1999). The 7 C's of wise shopping. Manila Bulletin.

Cita Chicago (17th ed.)

Estupigan, Ruth. "The 7 C's of Wise Shopping." Manila Bulletin 1999.

Cita MLA (9th ed.)

Estupigan, Ruth. "The 7 C's of Wise Shopping." Manila Bulletin, 1999.