APA (7th ed.) Citation

Villanueva, P. M. (2009). Discovering one world: (Book IV). Books Atbp.

Chicago Style (17th ed.) Citation

Villanueva, Perla M. Discovering One World: (Book IV). Mandaluyong City: Books Atbp, 2009.

MLA (9th ed.) Citation

Villanueva, Perla M. Discovering One World: (Book IV). Books Atbp, 2009.