Cita APA (7a ed.)

Martens, H. (1992). EC direct: A comprehensive directory of EC contacts. Blackwell Business.

Cita Chicago Style (17a ed.)

Martens, Hans. EC Direct: A Comprehensive Directory of EC Contacts. Oxford [etc.]: Blackwell Business, 1992.

Cita MLA (9a ed.)

Martens, Hans. EC Direct: A Comprehensive Directory of EC Contacts. Blackwell Business, 1992.