APA (7th ed.) Citation

Guillermo, R., Malonzo, J. D. R., & Guillermo, R. W. h. (2007). World history (2007 ed.). IBON Books.

Chicago Style (17th ed.) Citation

Guillermo, Ramon, Jennifer Del Rosario Malonzo, and Ramon. World history Guillermo. World History. 2007 ed. Quezon City: IBON Books, 2007.

MLA (9th ed.) Citation

Guillermo, Ramon, et al. World History. 2007 ed. IBON Books, 2007.