APA (7th ed.) Citation

Sadili, M. V., Jarumayan, G. A., & Navarro, A. S. (1982). The earth and its environment. Katha.

Chicago Style (17th ed.) Citation

Sadili, Milagros V., Germana A. Jarumayan, and Antonieta S. Navarro. The Earth and Its Environment. Quezon City: Katha, 1982.

MLA (9th ed.) Citation

Sadili, Milagros V., et al. The Earth and Its Environment. Katha, 1982.