Free and unfree labour.

MLA

Brass, Tom, Jan Lucassen, and Marcel van der Linden. Free and Unfree Labour. Amsterdam: International Institute for Social History, 1993.

APA

Brass, T., Lucassen, J., & van der Linden, M. (1993). Free and unfree labour. Amsterdam: International Institute for Social History.

Chicago

Brass, Tom, Jan Lucassen, and Marcel van der Linden. Free and Unfree Labour. Amsterdam: International Institute for Social History, 1993.