Umali, R. A. (1971). O Kaka, O kaka: Pampango folk song. Manlapaz Pub.
Cita Chicago (17th ed.)Umali, Restituto A. O Kaka, O Kaka: Pampango Folk Song. [Quezon City: Manlapaz Pub, 1971.
Cita MLA (9th ed.)Umali, Restituto A. O Kaka, O Kaka: Pampango Folk Song. Manlapaz Pub, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.