Citace podle APA (7th ed.)
Soike, L. J. (2013). Necessary courage: Iowa's Underground Railroad in the struggle against slavery. University of Iowa Press.
Citace podle Chicago (17th ed.)
Soike, Lowell J. Necessary Courage: Iowa's Underground Railroad in the Struggle Against Slavery. Iowa City: University of Iowa Press, 2013.
Citace podle MLA (9th ed.)
Soike, Lowell J. Necessary Courage: Iowa's Underground Railroad in the Struggle Against Slavery. University of Iowa Press, 2013.
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