June. Lyonel Feininger. Frederick A. Praeger. 1974. LCCN 72-888673. Hartley, Marsden. Lyonel Feininger. Museum of Modern Art, New York. 1944. Muir, Laura
2011]. Stringer, Andrew. Wallace Hartley. pendle.net. 2004 [1 June 2011]. (原始内容存档于2023-10-09). All at Sea. Wallace Hartley. allatsea.co.za. 2010 [1 June