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Diakses 20 Januari 2020Baby Centre. https://www.babycentre.co.uk/x25015781/is-my-baby-moving-too-much
Diakses 20 Januari 2020Parents. https://www.parents.com/pregnancy/stages/what-do-irregular-baby-kicks-mean/
Diakses 20 Januari 2020Live Science. https://www.livescience.com/62928-why-babies-kick.html
Diakses 20 Januari 2020Mayo Clinic. https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/sleep-during-pregnancy/art-20043827 Diakses 22 April 2020