APA (7. basım) Alıntı
Soike, L. J. (2013). Necessary courage: Iowa's Underground Railroad in the struggle against slavery. University of Iowa Press.
Chicago Style (17. basım) Atıf
Soike, Lowell J. Necessary Courage: Iowa's Underground Railroad in the Struggle Against Slavery. Iowa City: University of Iowa Press, 2013.
MLA (9th ed.) Atıf
Soike, Lowell J. Necessary Courage: Iowa's Underground Railroad in the Struggle Against Slavery. University of Iowa Press, 2013.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..