APA

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

Chicago

Klir George J, . 1969. An approach to general systems theory. New York: Van Nostrand Reinhold Co.

Harvard

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

MLA

Klir George J, . An approach to general systems theory. New York: Van Nostrand Reinhold Co. 1969.