Chicago: Heinrich Heine, "XII," Buch Der Lieder in Buch Der Lieder Original Sources, accessed March 29, 2023, http://www.originalsources.com/Document.aspx?DocID=LBFGW2VEVRQLEY4.
MLA: Heine, Heinrich. "XII." Buch Der Lieder, in Buch Der Lieder, Original Sources. 29 Mar. 2023. http://www.originalsources.com/Document.aspx?DocID=LBFGW2VEVRQLEY4.
Harvard: Heine, H, 'XII' in Buch Der Lieder. cited in , Buch Der Lieder. Original Sources, retrieved 29 March 2023, from http://www.originalsources.com/Document.aspx?DocID=LBFGW2VEVRQLEY4.