Keeling, L. B. (1974). Charles Hartshorne. Process studies, 4(4), 300-302. doi:10.2307/44797622
芝加哥风格引文Keeling, L. Bryant. "Charles Hartshorne." Process Studies 4, no. 4 (1974): 300-302, https://doi.org/10.2307/44797622.
MLA引文Keeling, L. Bryant. "Charles Hartshorne." Process Studies, vol. 4, no. 4, 1974, pp. 300-302, https://doi.org/10.2307/44797622.
警告：这些引文格式不一定是100％准确.