Gaya APA
WARSHAWSKY, Diane. (1993).
Spectrum 1: a communicative course in english .
Amerika:
Prentice Hall.
Gaya Chicago
WARSHAWSKY, Diane.
Spectrum 1: a communicative course in english.
Amerika:
Prentice Hall,
1993.
Text.
Gaya MLA
WARSHAWSKY, Diane.
Spectrum 1: a communicative course in english.
Amerika:
Prentice Hall,
1993.
Text.
Gaya Turabian
WARSHAWSKY, Diane.
Spectrum 1: a communicative course in english.
Amerika:
Prentice Hall,
1993.
Print.