Citazione Stile APA (7a Edizione)

Castillo, J. B. (1966). Some factors affecting achievement in elementary science. s.n.].

Citazione stile Chigago Style (17a edizione)

Castillo, Jovito B. Some Factors Affecting Achievement in Elementary Science. [Quezon City: s.n.], 1966.

Citatione MLA (9a ed.)

Castillo, Jovito B. Some Factors Affecting Achievement in Elementary Science. s.n.], 1966.