Brisenio, K. R., & Valerio, M. E. J. E. (2006). A Comparative study on the effects of different oral presentation methods on elementary school children's attention. College of Arts and Letters, University of the Philippines Diliman.

Brisenio, Kristine R., and Ma. Erica Jan E. Valerio. A Comparative Study on the Effects of Different Oral Presentation Methods on Elementary School Children's Attention. Quezon City: College of Arts and Letters, University of the Philippines Diliman, 2006.

Brisenio, Kristine R., and Ma. Erica Jan E. Valerio. A Comparative Study on the Effects of Different Oral Presentation Methods on Elementary School Children's Attention. College of Arts and Letters, University of the Philippines Diliman, 2006.