APA (7th ed.) Citation

Vergara, R. (1973). Programmed instruction on the English past tense for grade five. publisher not identified].

Chicago Style (17th ed.) Citation

Vergara, Ruperta. Programmed Instruction on the English Past Tense for Grade Five. [Quezon City: publisher not identified], 1973.

MLA (9th ed.) Citation

Vergara, Ruperta. Programmed Instruction on the English Past Tense for Grade Five. publisher not identified], 1973.