Robles, F. C. (1985). Developing English proficiency in college, book 2: Instructional material for English 2 Intermediate Communication Skills. Goodwill Trading Co.
Citazione stile Chigago Style (17a edizione)Robles, Felicidad C. Developing English Proficiency in College, Book 2: Instructional Material for English 2 Intermediate Communication Skills. Manila: Goodwill Trading Co, 1985.
Citatione MLA (9a ed.)Robles, Felicidad C. Developing English Proficiency in College, Book 2: Instructional Material for English 2 Intermediate Communication Skills. Goodwill Trading Co, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.