APA-ийн эшлэл(7 дахь хэвлэлт)
Pettigrew, W. A. (2013). Freedom's debt: The Royal African Company and the politics of the Atlantic slave trade, 1672-1752. The University of North Carolina Press.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Pettigrew, William A. Freedom's Debt: The Royal African Company and the Politics of the Atlantic Slave Trade, 1672-1752. Chapel Hill, [North Carolina]: The University of North Carolina Press, 2013.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Pettigrew, William A. Freedom's Debt: The Royal African Company and the Politics of the Atlantic Slave Trade, 1672-1752. The University of North Carolina Press, 2013.
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