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Heo, Soon-Bong. (2011). Why ?? Traditional Science . Jakarta: PT Gramedia Pustaka Utama.

Gaya Chicago

Heo, Soon-Bong. Why ?? Traditional Science. Jakarta: PT Gramedia Pustaka Utama, 2011. Text.

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Heo, Soon-Bong. Why ?? Traditional Science. Jakarta: PT Gramedia Pustaka Utama, 2011. Text.

Gaya Turabian

Heo, Soon-Bong. Why ?? Traditional Science. Jakarta: PT Gramedia Pustaka Utama, 2011. Print.