Arroyo, S. R. (1987). English for college freshmen. Rex Book Store.
Chicago Style aipamenaArroyo, Sandra Rodriguez. English for College Freshmen. Manila: Rex Book Store, 1987.
MLA aipamenaArroyo, Sandra Rodriguez. English for College Freshmen. Rex Book Store, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.