Heffron, P. (1890). Sacrificial Worship Essential to Religion, The Sacrificial Idea Goes Back to the Dawn of History. St. Paul, Minn..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeffron, P.R. Sacrificial Worship Essential to Religion, The Sacrificial Idea Goes Back to the Dawn of History. St. Paul, Minn., 1890.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeffron, P.R. Sacrificial Worship Essential to Religion, The Sacrificial Idea Goes Back to the Dawn of History. St. Paul, Minn., 1890.
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