APA

Wardhaugh R., Carrillo F. P., Madsen A. J. H., Matsui T., Peterson C., Steinbauer J., Stoffel B. & Williams D. C. (1976). English for a changing world 2: a program of communication skills for beginning students of English. Estados Unidos: Scott, Foresman and Company.

Chicago

Wardhaugh Ronald, Carrillo Felisa P, Madsen A J Hald, Matsui Tsukasa, Peterson Constance, Steinbauer Jo, Stoffel Beth and Williams Donald C. 1976. English for a changing world 2: a program of communication skills for beginning students of English. Estados Unidos: Scott, Foresman and Company.

Harvard

Wardhaugh R., Carrillo F. P., Madsen A. J. H., Matsui T., Peterson C., Steinbauer J., Stoffel B. and Williams D. C. (1976). English for a changing world 2: a program of communication skills for beginning students of English. Estados Unidos: Scott, Foresman and Company.

MLA

Wardhaugh Ronald, Carrillo Felisa P, Madsen A J Hald, Matsui Tsukasa, Peterson Constance, Steinbauer Jo, Stoffel Beth and Williams Donald C. English for a changing world 2: a program of communication skills for beginning students of English. Estados Unidos: Scott, Foresman and Company. 1976.