Duo Voice Recital. - Viguilla, Maria Cristina Q. (Quezon City UP College of Music, 1990)
Jonathan Emmanuel Dela Paz Zaens, baritone
U.P. College of Music Duo Voice Recital; Maria Cristina Q. Viguilla, soprano; Jonathan Emmanuel Dela Paz Zaens, baritone & Prof. Imelda C. Ongsiako, assisting artist at Abelardo Hall Auditorium, Diliman, Quezon City, December 11, 1990.
Imelda C. Ongsiako, assisting artist
Fredeline R. Parin, trumpet
Sal`my Neo D. Malaki, flute
Leonido M. Gines, Jr., vespone
UP Madrigal Singers Male Ensemble