Cita APA (7th ed.)

(1998). 50 immortal Filipino duets: The first-ever collection of timeless Philippine duets. National Philharmonic Society of the Philippines.

Cita Chicago (17th ed.)

50 Immortal Filipino Duets: The First-ever Collection of Timeless Philippine Duets. Makati: National Philharmonic Society of the Philippines, 1998.

Cita MLA (9th ed.)

50 Immortal Filipino Duets: The First-ever Collection of Timeless Philippine Duets. National Philharmonic Society of the Philippines, 1998.