APA-viite (7. p.)
Pettit, E., & Worthington, A. (2015). Sketches in the history of the Underground railroad. Open Road Integrated Media.
Chicago-viite (17. p.)
Pettit, Eber, ja Andrea Worthington. Sketches in the History of the Underground Railroad. New York, New York: Open Road Integrated Media, 2015.
MLA-viite (9. p.)
Pettit, Eber, ja Andrea Worthington. Sketches in the History of the Underground Railroad. Open Road Integrated Media, 2015.
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