Gaya APA
Billington, M., Stevenson, M. (2009).
Kegawatan dalam Kehamilan-Persalinan = Critical Care in Childbearing for Midwives .
Jakarta:
EGC.
Gaya MLA
Billington, Mary., Stevenson, Mandy.
"Kegawatan dalam Kehamilan-Persalinan = Critical Care in Childbearing for Midwives".
Jakarta:
EGC,
2009.
Text.