Chicago: Frederick Engels, "THE ORIGIN OF THE FAMILY, PRIVATE PROPERTY AND THE STATE," THE ORIGIN OF THE FAMILY, PRIVATE PROPERTY AND THE STATE (Chicago: Charles H Kerr & Company, 1908), Original Sources, accessed June 16, 2025, http://www.originalsources.com/Document.aspx?DocID=5YF3LAEZS9LST2G.

MLA: Engels, Frederick. "THE ORIGIN OF THE FAMILY, PRIVATE PROPERTY AND THE STATE." THE ORIGIN OF THE FAMILY, PRIVATE PROPERTY AND THE STATE, Chicago, Charles H Kerr & Company, 1908, Original Sources. 16 Jun. 2025. http://www.originalsources.com/Document.aspx?DocID=5YF3LAEZS9LST2G.

Harvard: Engels, F 1908, 'THE ORIGIN OF THE FAMILY, PRIVATE PROPERTY AND THE STATE' in THE ORIGIN OF THE FAMILY, PRIVATE PROPERTY AND THE STATE, Charles H Kerr & Company, Chicago. Original Sources, retrieved 16 June 2025, from http://www.originalsources.com/Document.aspx?DocID=5YF3LAEZS9LST2G.