Bellows, Mrs. Emma Louise, compiler. The paintings of George Bellows, New York, 1929, no. 118 (ill.; listed as Portrait of Samuel Knopf, 1922; measurements given as 40 x 32; Collection of Samuel Knopf, New York).Morgan, Charles H. George Bellows, Painter of America, New York, 1965, p. 254 (states that this portrait, painted in March 1922, pleased the subject).
