Urráburu, J. J. d. (1902). Ontologia. Razón y Fe.
Chicago Style (17th ed.) CitationUrráburu, Juan José de. Ontologia. Madrid: Razón y Fe, 1902.
MLA (9th ed.) CitationUrráburu, Juan José de. Ontologia. Razón y Fe, 1902.
Warning: These citations may not always be 100% accurate.