APA (7th ed.) Citation

Philippines. National Statistical Coordination Board. (1991). Philippine statistical yearbook 1991. NSB.

Chicago Style (17th ed.) Citation

Philippines. National Statistical Coordination Board. Philippine Statistical Yearbook 1991. Manila: NSB, 1991.

MLA (9th ed.) Citation

Philippines. National Statistical Coordination Board. Philippine Statistical Yearbook 1991. NSB, 1991.

Warning: These citations may not always be 100% accurate.