APA
Hopt K. J., . (1982). Groups of companies in European laws. New York: Walter De Gruyter.
Chicago
Hopt Klaus J, . 1982. Groups of companies in European laws. New York: Walter De Gruyter.
Harvard
Hopt K. J., . (1982). Groups of companies in European laws. New York: Walter De Gruyter.
MLA
Hopt Klaus J, . Groups of companies in European laws. New York: Walter De Gruyter. 1982.