APA

Rein D. P., . (1991). East West Workbook 1B. New York: Osford University Pres.

Chicago

Rein David P, . 1991. East West Workbook 1B. New York: Osford University Pres.

Harvard

Rein D. P., . (1991). East West Workbook 1B. New York: Osford University Pres.

MLA

Rein David P, . East West Workbook 1B. New York: Osford University Pres. 1991.