Cita APA (7th ed.)

Robles, F. C. (1988). Developing English proficiency in college (Rev. ed.). Goodwill.

Cita Chicago (17th ed.)

Robles, Felicidad C. Developing English Proficiency in College. Rev. ed. Manila: Goodwill, 1988.

Cita MLA (9th ed.)

Robles, Felicidad C. Developing English Proficiency in College. Rev. ed. Goodwill, 1988.