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Baston, Helen, Hall, Jennifer. (2011). Midwifery Essentials: persalinan Volume 3 . Jakarta: EGC.

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Baston, Helen, Hall, Jennifer. Midwifery Essentials: persalinan Volume 3. Jakarta: EGC, 2011. Text.

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Baston, Helen, Hall, Jennifer. Midwifery Essentials: persalinan Volume 3. Jakarta: EGC, 2011. Text.

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Baston, Helen, Hall, Jennifer. Midwifery Essentials: persalinan Volume 3. Jakarta: EGC, 2011. Print.