Não informado. Planning: A broadsheet issued by PEP. Political and Economic Planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Planning: A Broadsheet Issued by PEP. London: Political and Economic Planning.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Planning: A Broadsheet Issued by PEP. Political and Economic Planning.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.