Não informado. (1990). The British journal of general practice. Royal College of General Practitioners.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The British Journal of General Practice. London: Royal College of General Practitioners, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The British Journal of General Practice. Royal College of General Practitioners, 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.