Παραπομπή σε μορφή APA (7η εκδ.)

ebrary, Inc, Doolan, G. T., & Wippel, J. F. (2012). The science of being as being: Metaphysical investigations. Catholic University of America Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

ebrary, Inc, Gregory T. Doolan, και John F. Wippel. The Science of Being as Being: Metaphysical Investigations. Washington, DC: Catholic University of America Press, 2012.

Παραπομπή σε μορφή MLA (9th εκδ.)

ebrary, Inc, et al. The Science of Being as Being: Metaphysical Investigations. Catholic University of America Press, 2012.