APA

Brieger N., Comfort J., . (1993). Developing business contacts. New York: Prentice Hall.

Chicago

Brieger Nick, Comfort Jeremy, . 1993. Developing business contacts. New York: Prentice Hall.

Harvard

Brieger N., Comfort J., . (1993). Developing business contacts. New York: Prentice Hall.

MLA

Brieger Nick, Comfort Jeremy, . Developing business contacts. New York: Prentice Hall. 1993.