Calkhoven, L. (2008). Harriet Tubman: Leading the way to freedom. Sterling.
Cita Chicago Style (17a ed.)Calkhoven, Laurie. Harriet Tubman: Leading the Way to Freedom. New York: Sterling, 2008.
Cita MLA (8a ed.)Calkhoven, Laurie. Harriet Tubman: Leading the Way to Freedom. Sterling, 2008.
Precaución: Estas citas no son 100% exactas.