Παραπομπή σε μορφή APA (7η εκδ.)
Cogan, N. H. (2014). Union & states' rights: A history and interpretation of interposition, nullification, and secession, 150 Years after Sumter. University Of Akron Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Cogan, Neil H. Union & States' Rights: A History and Interpretation of Interposition, Nullification, and Secession, 150 Years After Sumter. Akron, Ohio: University Of Akron Press, 2014.
Παραπομπή σε μορφή MLA (9th εκδ.)
Cogan, Neil H. Union & States' Rights: A History and Interpretation of Interposition, Nullification, and Secession, 150 Years After Sumter. University Of Akron Press, 2014.
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