Cita APA

SCHUSTER, E. H. (1980). Americsn engglish to day.--ed.3. McGraw Hill.

Citación estilo Chicago

SCHUSTER, Edgar H. Americsn Engglish to Day.--ed.3. New York: McGraw Hill, 1980.

Cita MLA

SCHUSTER, Edgar H. Americsn Engglish to Day.--ed.3. McGraw Hill, 1980.