ebrary, Inc, & Esfeld, M. (2006). John Heil: Symposium on his ontological point of view. Ontos Verlag.
Citazione stile Chigago Style (17a edizione)ebrary, Inc, e Michael Esfeld. John Heil: Symposium on His Ontological Point of View. Frankfurt: Ontos Verlag, 2006.
Citatione MLA (9a ed.)ebrary, Inc, e Michael Esfeld. John Heil: Symposium on His Ontological Point of View. Ontos Verlag, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.