Cita APA (7th ed.)

Grossmann, R. (1992). The Existence of the World: An introduction to ontology. Routledge.

Cita Chicago (17th ed.)

Grossmann, Reinhardt. The Existence of the World: An Introduction to Ontology. London: Routledge, 1992.

Cita MLA (9th ed.)

Grossmann, Reinhardt. The Existence of the World: An Introduction to Ontology. Routledge, 1992.