Gaya APA
Williams, J. Whitridge. (1997).
Williams obstetrics, 20th ed. (20th ed.).
:
.
Gaya Chicago
Williams, J. Whitridge.
Williams obstetrics, 20th ed..
20th ed.
:
,
1997.
Text.
Gaya MLA
Williams, J. Whitridge.
Williams obstetrics, 20th ed..
20th ed.
:
,
1997.
Text.
Gaya Turabian
Williams, J. Whitridge.
Williams obstetrics, 20th ed..
20th ed.
:
,
1997.
Print.