(1907). From left to right: Hilferding, Minna Ledebour, Minna K., Luise K., Anna Pannekoek, Mrs. Block, Georg Ledebour, Anton Pannekoek with son. Kneeling: KarlK., Hans Block, Mathilde Wurm. Lying: Benedikt K. and children Block.
Chicago Style (17th ed.) CitationFrom Left to Right: Hilferding, Minna Ledebour, Minna K., Luise K., Anna Pannekoek, Mrs. Block, Georg Ledebour, Anton Pannekoek with Son. Kneeling: KarlK., Hans Block, Mathilde Wurm. Lying: Benedikt K. and Children Block. 1907.
MLA (8th ed.) CitationFrom Left to Right: Hilferding, Minna Ledebour, Minna K., Luise K., Anna Pannekoek, Mrs. Block, Georg Ledebour, Anton Pannekoek with Son. Kneeling: KarlK., Hans Block, Mathilde Wurm. Lying: Benedikt K. and Children Block. 1907.
Warning: These citations may not always be 100% accurate.