Bale, I. (1960). Trough seven reigns: A history of the Newport Borough Police / by Islwyn Bale. Hughes.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBale, Islwyn. Trough Seven Reigns: A History of the Newport Borough Police / by Islwyn Bale. [pontipool]: Hughes, 1960.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBale, Islwyn. Trough Seven Reigns: A History of the Newport Borough Police / by Islwyn Bale. Hughes, 1960.
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