APA (7th ed.) Citation

Sevilla, C. G. (1988). An Introduction to research methods (2nd ed.). Rex Book Store.

Chicago Style (17th ed.) Citation

Sevilla, Consuelo G. An Introduction to Research Methods. 2nd ed. Manila: Rex Book Store, 1988.

MLA (9th ed.) Citation

Sevilla, Consuelo G. An Introduction to Research Methods. 2nd ed. Rex Book Store, 1988.