APA
Heckmann F., Bosswick W. & Weizsäcker R. v. (1995). Migration policies: a comparative perspective. Stuttgart: Enke.
Chicago
Heckmann Friedrich, Bosswick Wolfgang and Weizsäcker Richard von. 1995. Migration policies: a comparative perspective. Stuttgart: Enke.
Harvard
Heckmann F., Bosswick W. and Weizsäcker R. v. (1995). Migration policies: a comparative perspective. Stuttgart: Enke.
MLA
Heckmann Friedrich, Bosswick Wolfgang and Weizsäcker Richard von. Migration policies: a comparative perspective. Stuttgart: Enke. 1995.