APA

Lawesson J. E., Hamann O. & Black J. (1990). Combined recommendations from the workshop. : .

Chicago

Lawesson Jonas E, Hamann Ole and Black Juan. 1990. Combined recommendations from the workshop. : .

Harvard

Lawesson J. E., Hamann O. and Black J. (1990). Combined recommendations from the workshop. : .

MLA

Lawesson Jonas E, Hamann Ole and Black Juan. Combined recommendations from the workshop. : . 1990.