APA (7th ed.) Citation

De la Cruz, R. R. (1975). Public relations: Theory and practice ([New ed.].). R. R. Public Relations.

Chicago Style (17th ed.) Citation

De la Cruz, R. R. Public Relations: Theory and Practice. [New ed.]. Manila: R. R. Public Relations, 1975.

MLA (9th ed.) Citation

De la Cruz, R. R. Public Relations: Theory and Practice. [New ed.]. R. R. Public Relations, 1975.