APA

Devries M. A., . (1993). Complete Secretary Hand book. London: Prentice Hall.

Chicago

Devries Mary A, . 1993. Complete Secretary Hand book. London: Prentice Hall.

Harvard

Devries M. A., . (1993). Complete Secretary Hand book. London: Prentice Hall.

MLA

Devries Mary A, . Complete Secretary Hand book. London: Prentice Hall. 1993.