Style de citation APA (7e éd.)
ebrary, Inc, & Wippel, J. F. (2011). The ultimate why question: Why is there anything at all rather than nothing whatsoever? Catholic University of America Press.
Style de citation Chicago (17e éd.)
ebrary, Inc, et John F. Wippel. The Ultimate Why Question: Why Is There Anything at All Rather than Nothing Whatsoever? Washington, D.C.: Catholic University of America Press, 2011.
Style de citation MLA (9e éd.)
ebrary, Inc, et John F. Wippel. The Ultimate Why Question: Why Is There Anything at All Rather than Nothing Whatsoever? Catholic University of America Press, 2011.
Attention : ces citations peuvent ne pas être correctes à 100%.