APA (7th ed.) Citation

Makil, P. Q., & Covar, L. C. (1972). Selected survey instruments (Trial ed.). Philippine Social Science Council.

Chicago Style (17th ed.) Citation

Makil, Perla Q., and Leticia C. Covar. Selected Survey Instruments. Trial ed. Quezon City: Philippine Social Science Council, 1972.

MLA (9th ed.) Citation

Makil, Perla Q., and Leticia C. Covar. Selected Survey Instruments. Trial ed. Philippine Social Science Council, 1972.

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