Cita APA (7th ed.)

Estupigan, R. (1997). Secrets of effective study habits. Manila Bulletin.

Cita Chicago (17th ed.)

Estupigan, Ruth. "Secrets of Effective Study Habits." Manila Bulletin 1997.

Cita MLA (9th ed.)

Estupigan, Ruth. "Secrets of Effective Study Habits." Manila Bulletin, 1997.