APA (7th ed.) Citation

Wheeler, T., & Simon, A. R. (1995). Open systems handbook (2nd ed.). AP Professional.

Chicago Style (17th ed.) Citation

Wheeler, Tom, and Alan R. Simon. Open Systems Handbook. 2nd ed. Boston: AP Professional, 1995.

MLA (9th ed.) Citation

Wheeler, Tom, and Alan R. Simon. Open Systems Handbook. 2nd ed. AP Professional, 1995.