APA-ийн эшлэл(7 дахь хэвлэлт)
ebrary, Inc, & Ripley, C. P. (1993). Witness for freedom: African American voices on race, slavery, and emancipation. University of North Carolina Press.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
ebrary, Inc, ба C. Peter Ripley. Witness for Freedom: African American Voices on Race, Slavery, and Emancipation. Chapel Hill: University of North Carolina Press, 1993.
MLA -ийн эшлэл (9 дэх хэвлэлт)
ebrary, Inc, ба C. Peter Ripley. Witness for Freedom: African American Voices on Race, Slavery, and Emancipation. University of North Carolina Press, 1993.
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