Penrose, E. (1968). A Note on Development Planning and The Role of The Enterprise. The Institute of National Planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPenrose, E. A Note on Development Planning and The Role of The Enterprise. Cairo: The Institute of National Planning, 1968.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPenrose, E. A Note on Development Planning and The Role of The Enterprise. The Institute of National Planning, 1968.
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