APA (7th ed.) Citation

Janssen, V. (1992). Jean Boullet. Janssen Verlag.

Chicago Style (17th ed.) Citation

Janssen, Volker. Jean Boullet. Berlin: Janssen Verlag, 1992.

MLA (9th ed.) Citation

Janssen, Volker. Jean Boullet. Janssen Verlag, 1992.

Warning: These citations may not always be 100% accurate.