Heers, J. (1977). Family clans in the Middle Ages: A study of political and social structures in urban areas. North-Holland Pub. Co..
Citace podle Chicago (17th ed.)Heers, Jacques. Family Clans in the Middle Ages: A Study of Political and Social Structures in Urban Areas. Amsterdam ; New York: North-Holland Pub. Co., 1977.
Citace podle MLA (8th ed.)Heers, Jacques. Family Clans in the Middle Ages: A Study of Political and Social Structures in Urban Areas. North-Holland Pub. Co., 1977.
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