Simpson, G., & Merk, F. (1968). Fur trade and empire: George Simpson's journal entitled Remarks connected with the fur trade in the course of a voyage from York Factory to Fort George and back to York Factory 1824-25, with related documents (Rev. ed.). Belknap Press of Harvard University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Simpson, George, و Frederick Merk. Fur Trade and Empire: George Simpson's Journal Entitled Remarks Connected with the Fur Trade in the Course of a Voyage from York Factory to Fort George and Back to York Factory 1824-25, with Related Documents. Rev. ed. Cambridge, Mass.: Belknap Press of Harvard University Press, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Simpson, George, و Frederick Merk. Fur Trade and Empire: George Simpson's Journal Entitled Remarks Connected with the Fur Trade in the Course of a Voyage from York Factory to Fort George and Back to York Factory 1824-25, with Related Documents. Rev. ed. Belknap Press of Harvard University Press, 1968.