Karen Müller.

MLA

Mahnert-Lueg , Hakenjos , Joppien Schmitt [e.a.]. Karen Müller. Essen: Business & Pleasure, .199.

APA

Mahnert-Lueg , J. Schmitt [e.a.]. (.199). Karen Müller. Essen: Business & Pleasure.

Chicago

Mahnert-Lueg , Hakenjos , Joppien Schmitt [e.a.] Karen Müller. Essen: Business & Pleasure, .199.