APA-ийн эшлэл(7 дахь хэвлэлт)

Stewart, J. (2008). Heiberg's Contingency regarded from the point of view of logic and other texts. Museum Tusculanum Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Stewart, Jon. Heiberg's Contingency Regarded from the Point of View of Logic and Other Texts. Copenhagen, Denmark: Museum Tusculanum Press, 2008.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Stewart, Jon. Heiberg's Contingency Regarded from the Point of View of Logic and Other Texts. Museum Tusculanum Press, 2008.