Dyfyniad APA

Payawal, P. C., Esmundo, R. R., & Pagulayan, R. C. (1999). Life and the planet earth. Learning Resource Center, University of the Philippines.

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

Payawal, Pacifico C., et al. Life and the Planet Earth. Learning Resource Center, University of the Philippines, 1999.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.