APA (7th ed.) Citation

Klir, G. J. (1969). An approach to general systems theory. Van Nostrand Reinhold.

Chicago Style (17th ed.) Citation

Klir, George J. An Approach to General Systems Theory. New York [etc.]: Van Nostrand Reinhold, 1969.

MLA (9th ed.) Citation

Klir, George J. An Approach to General Systems Theory. Van Nostrand Reinhold, 1969.