Cita APA (7th ed.)

Philippines. The National Library. (2007). Philippine national bibliography 2006. National Library of the Philippines.

Cita Chicago (17th ed.)

Philippines. The National Library. Philippine National Bibliography 2006. Manila: National Library of the Philippines, 2007.

Cita MLA (9th ed.)

Philippines. The National Library. Philippine National Bibliography 2006. National Library of the Philippines, 2007.