APA

Ashley A., Oxford University Press, . (1994). A handbook commercial correspondence. Oxford: Oxford Univ. Press.

Chicago

Ashley A, Oxford University Press, . 1994. A handbook commercial correspondence. Oxford: Oxford Univ. Press.

Harvard

Ashley A., Oxford University Press, . (1994). A handbook commercial correspondence. Oxford: Oxford Univ. Press.

MLA

Ashley A, Oxford University Press, . A handbook commercial correspondence. Oxford: Oxford Univ. Press. 1994.