Não informado. (1958). Information circular. Mines Branch, Department of Energy, Mines and Resources.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Information Circular. Ottawa: Mines Branch, Department of Energy, Mines and Resources, 1958.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Information Circular. Mines Branch, Department of Energy, Mines and Resources, 1958.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.