Cita APA (7th ed.)

Gutierrez, I. M. (1993). Energy and environment. Philippine Collegian.

Cita Chicago (17th ed.)

Gutierrez, Ibarra M. "Energy and Environment." Philippine Collegian 1993.

Cita MLA (9th ed.)

Gutierrez, Ibarra M. "Energy and Environment." Philippine Collegian, 1993.