APA (7th ed.) Citation

Villareal, C. T. (1965). Challenge and opportunity. s.n.

Chicago Style (17th ed.) Citation

Villareal, Cornelio Tupaz. Challenge and Opportunity. [Manilan: s.n, 1965.

MLA (9th ed.) Citation

Villareal, Cornelio Tupaz. Challenge and Opportunity. s.n, 1965.