APA

Graves K., Graves K., . (1999). East West Workbook 1A. New York: Oxford University Press.

Chicago

Graves Kathleen, Graves Kathleen, . 1999. East West Workbook 1A. New York: Oxford University Press.

Harvard

Graves K., Graves K., . (1999). East West Workbook 1A. New York: Oxford University Press.

MLA

Graves Kathleen, Graves Kathleen, . East West Workbook 1A. New York: Oxford University Press. 1999.