APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

De la Cruz, R. R. Public Relations: Theory and Practice. New edition. Manila: R. R. Public Relations, 1975.

MLA (9th ed.) Citation

De la Cruz, R. R. Public Relations: Theory and Practice. New edition. R. R. Public Relations, 1975.