Peter Riley. (2005). Checkpoint Chemistry Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.".
Citace podle Chicago (17th ed.)Peter Riley. Checkpoint Chemistry Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.", 2005.
Citace podle MLA (9th ed.)Peter Riley. Checkpoint Chemistry Pupil's Book (Checkpoint Science). "Trans-Atlantic Publications, Inc.", 2005.
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