Não informado. (1952). Past and Present: A journal of historical studies. Past and Present Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Past and Present: A Journal of Historical Studies. Oxford, Inglaterra: Past and Present Society, 1952.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Past and Present: A Journal of Historical Studies. Past and Present Society, 1952.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.