Cita APA

Esmundo, R. R., Pagulayan, R. C., & Payawal, P. C. (1999). Life and the planet Earth. Learning Resource Center.

Citación estilo Chicago

Esmundo, Rosalinda R., Roberto C. Pagulayan, and Pacifico C. Payawal. Life and the Planet Earth. Quezon City: Learning Resource Center, 1999.

Cita MLA

Esmundo, Rosalinda R., et al. Life and the Planet Earth. Learning Resource Center, 1999.