APA (7th ed.) Citation

Gregorio, H. C., Cruz, P. C., & Gregorio, C. M. (1965). Teaching elementary school subjects. R.P. Garcia Pub.

Chicago Style (17th ed.) Citation

Gregorio, Herman Cruz, Potenciana C. Cruz, and Cornella M. Gregorio. Teaching Elementary School Subjects. Quezon City: R.P. Garcia Pub, 1965.

MLA (9th ed.) Citation

Gregorio, Herman Cruz, et al. Teaching Elementary School Subjects. R.P. Garcia Pub, 1965.