Cita APA (7th ed.)

Englebretsen, G. (2012). Robust reality: An essay in formal ontology. Ontos Verlag.

Cita Chicago (17th ed.)

Englebretsen, George. Robust Reality: An Essay in Formal Ontology. Frankfurt: Ontos Verlag, 2012.

Cita MLA (9th ed.)

Englebretsen, George. Robust Reality: An Essay in Formal Ontology. Ontos Verlag, 2012.