Shaw, E., & Rutherford, W. E. (1983). Life styles: Workbook. Longman.
Cita Chicago (17th ed.)Shaw, Ellen, i William E. Rutherford. Life Styles: Workbook. New York: Longman, 1983.
Cita MLA (9th ed.)Shaw, Ellen, i William E. Rutherford. Life Styles: Workbook. Longman, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.