Peter Riley. (2005). Checkpoint Biology Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.".
Chicago Style (17. basım) AtıfPeter Riley. Checkpoint Biology Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.", 2005.
MLA (9th ed.) AtıfPeter Riley. Checkpoint Biology Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.", 2005.
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