Marchenko, Y. (2009). Origen's System of Views (by Labor About Beginnings).
Chicago Style (17th ed.) CitationMarchenko, Ya. Origen's System of Views (by Labor About Beginnings). 2009.
MLA (8th ed.) CitationMarchenko, Ya. Origen's System of Views (by Labor About Beginnings). 2009.
Warning: These citations may not always be 100% accurate.