APA

Tulip M., . (2005). Head for Business. Upper-intermediate. New York: Oxford University Press.

Chicago

Tulip M, . 2005. Head for Business. Upper-intermediate. New York: Oxford University Press.

Harvard

Tulip M., . (2005). Head for Business. Upper-intermediate. New York: Oxford University Press.

MLA

Tulip M, . Head for Business. Upper-intermediate. New York: Oxford University Press. 2005.