APA (7th ed.) Citation

Berg, J. (1992). Ontology without ultrafilters and possible worlds: An examination of Bolzano's ontology (1. Aufl.). Academia-Verl.

Chicago Style (17th ed.) Citation

Berg, Jan. Ontology Without Ultrafilters and Possible Worlds: An Examination of Bolzano's Ontology. 1. Aufl. Sankt Augustin: Academia-Verl, 1992.

MLA (9th ed.) Citation

Berg, Jan. Ontology Without Ultrafilters and Possible Worlds: An Examination of Bolzano's Ontology. 1. Aufl. Academia-Verl, 1992.

Warning: These citations may not always be 100% accurate.