Drayton, W. H., Gadsden, C., Mackenzie, J., & Wragg, W. (1977). The letters of Freeman, etc.: Essays on the nonimportation movement in South Carolina. Columbia: University of South Carolina Press.

Drayton, William Henry, Christopher Gadsden, John Mackenzie, and William Wragg. The Letters of Freeman, Etc.: Essays On the Nonimportation Movement in South Carolina. Columbia: University of South Carolina Press, 1977.

Drayton, William Henry, Christopher Gadsden, John Mackenzie, and William Wragg. The Letters of Freeman, Etc.: Essays On the Nonimportation Movement in South Carolina. Columbia: University of South Carolina Press, 1977.