APA (7th ed.) Citation

(1971). Hierarchically organized systems in theory and practice. Hafner.

Chicago Style (17th ed.) Citation

Hierarchically Organized Systems in Theory and Practice. New York: Hafner, 1971.

MLA (9th ed.) Citation

Hierarchically Organized Systems in Theory and Practice. Hafner, 1971.

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