Canada. Natural Resources Intelligence Branch & Voorhis, E. (1930). Historic forts and trading posts of the French regime and of the English fur trading companies.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Canada. Natural Resources Intelligence Branch و Ernest Voorhis. Historic Forts and Trading Posts of the French Regime and of the English Fur Trading Companies. [Ottawa, 1930.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Canada. Natural Resources Intelligence Branch و Ernest Voorhis. Historic Forts and Trading Posts of the French Regime and of the English Fur Trading Companies. 1930.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.