Peter Riley. (2005). Checkpoint Chemistry Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.".
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPeter Riley. Checkpoint Chemistry Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.", 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPeter Riley. Checkpoint Chemistry Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.", 2005.
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