Cita APA (7th ed.)

ebrary, Inc, & De Groot, J. (2004). Nature in American philosophy. Catholic University of America Press.

Cita Chicago (17th ed.)

ebrary, Inc, i Jean De Groot. Nature in American Philosophy. Washington, D.C.: Catholic University of America Press, 2004.

Cita MLA (9th ed.)

ebrary, Inc, i Jean De Groot. Nature in American Philosophy. Catholic University of America Press, 2004.