Wengert, E. S. (1957). Case studies as tools of administrative analysis. Philippine Journal of Public Administration.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWengert, Egbert S. "Case Studies as Tools of Administrative Analysis." Philippine Journal of Public Administration 1957.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWengert, Egbert S. "Case Studies as Tools of Administrative Analysis." Philippine Journal of Public Administration, 1957.
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