Não informado. (1969). Organic Preparations and Procedures International. Organic Preparations and Procedures.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Organic Preparations and Procedures International. Newton, Mass: Organic Preparations and Procedures, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Organic Preparations and Procedures International. Organic Preparations and Procedures, 1969.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.