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Baston, Helen, Hall, Jennifer. (2012). Midwifery essentials : persalinan . Jakarta: EGC.

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Baston, Helen, Hall, Jennifer. Midwifery essentials : persalinan. Jakarta: EGC, 2012. Text.

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Baston, Helen, Hall, Jennifer. Midwifery essentials : persalinan. Jakarta: EGC, 2012. Text.

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Baston, Helen, Hall, Jennifer. Midwifery essentials : persalinan. Jakarta: EGC, 2012. Print.