Mark Levesly. (2021). Cambridge Lower Secondary Science Stage 9: Student's Book. HarperCollins.
Chicago Style (17. basım) AtıfMark Levesly. Cambridge Lower Secondary Science Stage 9: Student's Book. London: HarperCollins, 2021.
MLA (9th ed.) AtıfMark Levesly. Cambridge Lower Secondary Science Stage 9: Student's Book. HarperCollins, 2021.
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