Gaya APA
Speaking naturally : communication skills in American English. ().
:
Cambridge University Press.
Gaya Chicago
Speaking naturally : communication skills in American English.
.
:
Cambridge University Press,
.
Text.
Gaya MLA
Speaking naturally : communication skills in American English.
.
:
Cambridge University Press,
.
Text.
Gaya Turabian
Speaking naturally : communication skills in American English.
:
Cambridge University Press,
.
Print.