SALES, R. [. (1978). Children's Britannica 18: Tracks - walls and fences. Encyclopaedia Britannica International.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSALES, Robin [Ed.]. Children's Britannica 18: Tracks - Walls and Fences. London: Encyclopaedia Britannica International, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSALES, Robin [Ed.]. Children's Britannica 18: Tracks - Walls and Fences. Encyclopaedia Britannica International, 1978.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.