APA (7th ed.) Citation

Padasas, T. P. (2009). Operating system and office applications (2nd ed.). Vibal Publishing House.

Chicago Style (17th ed.) Citation

Padasas, Teresita P. Operating System and Office Applications. 2nd ed. Quezon City, Phils: Vibal Publishing House, 2009.

MLA (9th ed.) Citation

Padasas, Teresita P. Operating System and Office Applications. 2nd ed. Vibal Publishing House, 2009.