Styl cytowania APA

Adams, W. P., & Helbich, W. J. (1994). Directory of European historians of North America: Addresses, publications, research in progress. John-F.-Kennedy-Inst. für Nordamerikastudien.

Styl cytowania Chicago

Adams, Willi Paul, i Wolfgang J. Helbich. Directory of European Historians of North America: Addresses, Publications, Research in Progress. Berlin: John-F.-Kennedy-Inst. für Nordamerikastudien, 1994.

Styl cytowania MLA

Adams, Willi Paul, i Wolfgang J. Helbich. Directory of European Historians of North America: Addresses, Publications, Research in Progress. John-F.-Kennedy-Inst. für Nordamerikastudien, 1994.