APA (7th ed.) Citation

Andal, G. A., Tolentino, B. S., & Yambao, B. (1973). Philippine volcanoes and solfataric areas (2nd revision.). Published with the permission of the Commission on Volcanology.

Chicago Style (17th ed.) Citation

Andal, Gregorio A., Bernardo S. Tolentino, and Benigno Yambao. Philippine Volcanoes and Solfataric Areas. 2nd revision. Quezon City: Published with the permission of the Commission on Volcanology, 1973.

MLA (9th ed.) Citation

Andal, Gregorio A., et al. Philippine Volcanoes and Solfataric Areas. 2nd revision. Published with the permission of the Commission on Volcanology, 1973.