APA-Zitierstil (7. Ausg.)

(2008). Heiberg's Contingency regarded from the point of view of logic and other texts. Museum Tusculanum Press [u.a.].

Chicago-Zitierstil (17. Ausg.)

Heiberg's Contingency Regarded from the Point of View of Logic and Other Texts. Copenhagen: Museum Tusculanum Press [u.a.], 2008.

MLA-Zitierstil (9. Ausg.)

Heiberg's Contingency Regarded from the Point of View of Logic and Other Texts. Museum Tusculanum Press [u.a.], 2008.