APA (7th ed.) Citation

Mamanglu, S., & Leyco, N. A. (1999). Population of the world hits 6 billion today. Manila Bulletin.

Chicago Style (17th ed.) Citation

Mamanglu, Shianee, and Nazarene A. Leyco. "Population of the World Hits 6 Billion Today." Manila Bulletin 1999.

MLA (9th ed.) Citation

Mamanglu, Shianee, and Nazarene A. Leyco. "Population of the World Hits 6 Billion Today." Manila Bulletin, 1999.

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