Цитирование APA (7-е изд.)
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.
Цитирование в стиле Чикаго (17-е изд.)
ebrary, Inc, и 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.
Цитирование MLA (9-е изд.)
ebrary, Inc, и John F. Wippel. The Ultimate Why Question: Why Is There Anything at All Rather than Nothing Whatsoever? Catholic University of America Press, 2011.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.