APA (7th ed.) Citation

Geconcillo, O. (1965). A diagnostic test in composition for fourth year high school students. publisher not identified].

Chicago Style (17th ed.) Citation

Geconcillo, Ofelia. A Diagnostic Test in Composition for Fourth Year High School Students. [Quezon City: publisher not identified], 1965.

MLA (9th ed.) Citation

Geconcillo, Ofelia. A Diagnostic Test in Composition for Fourth Year High School Students. publisher not identified], 1965.

Warning: These citations may not always be 100% accurate.