APA (7th ed.) Citation

Jaspers, K. (1968). The perennial scope of philosophy. Archon Books.

Chicago Style (17th ed.) Citation

Jaspers, Karl. The Perennial Scope of Philosophy. [Hamden, Conn.]: Archon Books, 1968.

MLA (9th ed.) Citation

Jaspers, Karl. The Perennial Scope of Philosophy. Archon Books, 1968.

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