Gaya APA
Varney, H.
(1987).
Varney's Midwifery
(
Edisi 3)
.
United State of America:
Jones and Bartlett Pubishers.
Gaya MLA
Varney, Helen.
"Varney's Midwifery".
Edisi 3
United State of America:
Jones and Bartlett Pubishers,
1987.
Text.