APA (7th ed.) Citation

Van Croonenburg, E. J. (1971). Gateway to reality: An introduction to philosophy. Herder and Herder.

Chicago Style (17th ed.) Citation

Van Croonenburg, Engelbert Johannes. Gateway to Reality: An Introduction to Philosophy. [New York]: Herder and Herder, 1971.

MLA (9th ed.) Citation

Van Croonenburg, Engelbert Johannes. Gateway to Reality: An Introduction to Philosophy. Herder and Herder, 1971.