Simonetti, J. L., Spirn, S., Sullivan, D., & Klein, T. A. (1978). Open systems model to analyze city government service delivery. Philippine Journal of Public Administration.
Cita Chicago (17th ed.)Simonetti, Jack L., Steven Spirn, Dale Sullivan, i Thomas A. Klein. "Open Systems Model to Analyze City Government Service Delivery." Philippine Journal of Public Administration 1978.
Cita MLA (9th ed.)Simonetti, Jack L., et al. "Open Systems Model to Analyze City Government Service Delivery." Philippine Journal of Public Administration, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.