Kruskopf, E. (1976). Shaping the invisible: A study of the genesis of non-representational painting, 1908-1919. Societas Scientiarum Fennica.
芝加哥风格引文Kruskopf, Erik. Shaping the Invisible: A Study of the Genesis of Non-representational Painting, 1908-1919. Helsinki: Societas Scientiarum Fennica, 1976.
MLA引文Kruskopf, Erik. Shaping the Invisible: A Study of the Genesis of Non-representational Painting, 1908-1919. Societas Scientiarum Fennica, 1976.
警告：这些引文格式不一定是100％准确.