APA (7th ed.) Citation

Ople, B. F. (1975). The challenge to Philippine psychology.

Chicago Style (17th ed.) Citation

Ople, Blas F. The Challenge to Philippine Psychology. 1975.

MLA (9th ed.) Citation

Ople, Blas F. The Challenge to Philippine Psychology. 1975.

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