Robles, F. C. (1985). Developing English proficiency in college, book 2: Instructional material for English 2 Intermediate Communication Skills. Goodwill Trading Co.
Cita Chicago (17th ed.)Robles, Felicidad C. Developing English Proficiency in College, Book 2: Instructional Material for English 2 Intermediate Communication Skills. Manila: Goodwill Trading Co, 1985.
Cita MLA (9th ed.)Robles, Felicidad C. Developing English Proficiency in College, Book 2: Instructional Material for English 2 Intermediate Communication Skills. Goodwill Trading Co, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.