Não informado. (1973). Journal of the Society of Leather Technologists and Chemists. Society of Leather Technologists and Chemists.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Society of Leather Technologists and Chemists. Redbourne, Inglaterra: Society of Leather Technologists and Chemists, 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Society of Leather Technologists and Chemists. Society of Leather Technologists and Chemists, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.