Abrugena, M. A. M., & De Leon, I. C. (2010). The Relationship between the level of intimacy between the source and the recipient and the recipient's perception of humor-based and non-humor-based criticisms. College of Arts and Letters, University of the Philippines Diliman.

Abrugena, Myr Arnhem M., and Ianthe C. De Leon. The Relationship Between the Level of Intimacy Between the Source and the Recipient and the Recipient's Perception of Humor-based and Non-humor-based Criticisms. Quezon City: College of Arts and Letters, University of the Philippines Diliman, 2010.

Abrugena, Myr Arnhem M., and Ianthe C. De Leon. The Relationship Between the Level of Intimacy Between the Source and the Recipient and the Recipient's Perception of Humor-based and Non-humor-based Criticisms. College of Arts and Letters, University of the Philippines Diliman, 2010.