De Leon, G. A. (1997). Graduation Recital (voice). UP College of Music.
芝加哥风格引文De Leon, Greg Abelardo. Graduation Recital (voice). Quezon City: UP College of Music, 1997.
MLA引文De Leon, Greg Abelardo. Graduation Recital (voice). UP College of Music, 1997.
警告：这些引文格式不一定是100％准确.