APA
Von Hildebrand D., . (1960). What is Philosophy?. Milwaukee: Bruce Publishing Co.
Chicago
Von Hildebrand Dietrich, . 1960. What is Philosophy?. Milwaukee: Bruce Publishing Co.
Harvard
Von Hildebrand D., . (1960). What is Philosophy?. Milwaukee: Bruce Publishing Co.
MLA
Von Hildebrand Dietrich, . What is Philosophy?. Milwaukee: Bruce Publishing Co. 1960.
