APA (7th ed.) Citation

Bolos, D. M., & Apin, M. C. A. Internal migration in the Philippines: A survey.

Chicago Style (17th ed.) Citation

Bolos, Divina M., and Ma. Concepcion A. Apin. Internal Migration in the Philippines: A Survey.

MLA (9th ed.) Citation

Bolos, Divina M., and Ma. Concepcion A. Apin. Internal Migration in the Philippines: A Survey.

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