Co, Michael and Macalindong, Anthony P. and Villanueva, Jose Mari (1987) An exploratory study on the factors contributing to the success of Filipina sales agents of Insular Life Insurance Company. Undergraduate thesis, De La Salle University-Dasmarinas.

Co, Michael and Roque, Pen and Herrera, Saul (1980) The effect of stimulus suffix on recalling telephone numbers. Undergraduate thesis, De La Salle University-Dasmarinas.