APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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