Gaya APA
Obstetri Williams
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(2016).
Jakarta .:
EGC ..
Gaya Chicago
Obstetri Williams
.
.
Jakarta .:
EGC .,
2016.
Text.
Gaya MLA
Obstetri Williams
.
.
Jakarta .:
EGC .,
2016.
Text.
Gaya Turabian
Obstetri Williams
.
Jakarta .:
EGC .,
2016.
Print.