APA-referens (7:e uppl.)

De Leon, G. A. (1997). Graduation Recital (voice). UP College of Music.

Chicago-referens (17:e uppl.)

De Leon, Greg Abelardo. Graduation Recital (voice). Quezon City: UP College of Music, 1997.

MLA-referens (9:e uppl.)

De Leon, Greg Abelardo. Graduation Recital (voice). UP College of Music, 1997.