Helmer, C. (2004). Schleiermacher and Whitehead: Open systems in dialogue. Walter de Gruyter.
芝加哥风格引文Helmer, Christine. Schleiermacher and Whitehead: Open Systems in Dialogue. Berlin ; New York: Walter de Gruyter, 2004.
MLA引文Helmer, Christine. Schleiermacher and Whitehead: Open Systems in Dialogue. Walter de Gruyter, 2004.
警告：这些引文格式不一定是100％准确.