Gaya APA
L, H., V., J., M., C. (2004).
VARNEY'S MIDWIFERY (fourth edition).
London:
Jones and Barlett Publishers.
Gaya MLA
L, Helen, Varney,, Jan, M.Kriebs,, Carolyn.
"VARNEY'S MIDWIFERY".
fourth edition
London:
Jones and Barlett Publishers,
2004.
Buku Inti.