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{{Citation
|publisher = Gateway Press
|publication-place = Baltimore
|author = Orval O. Calhoun
|url = http://openlibrary.org/books/OL3319272M/800_years_of_Colquhoun_Colhoun_Calhoun_and_Cahoon_family_history_in_Ireland_Scotland_England_United_States_of_America_Australia_and_Canada
|title = 800 years of Colquhoun, Colhoun, Calhoun, and Cahoon family history in Ireland, Scotland, England, United States of America, Australia, and Canada
|publication-date = 2003
}}