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Justin Harris, dkk. (2018). Cambridge IGCSE: Design dan Technology . London: Collins.

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Justin Harris, dkk. Cambridge IGCSE: Design dan Technology. London: Collins, 2018. Text.

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Justin Harris, dkk. Cambridge IGCSE: Design dan Technology. London: Collins, 2018. Text.

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Justin Harris, dkk. Cambridge IGCSE: Design dan Technology. London: Collins, 2018. Print.