APA Style
Warshawsky, D. (1984).
Spectrum 4: A communicative course in English .
Englewood Cliffts, NJ:
Prentice Hall Regents.
MLA Style
Warshawsky, Diane.
"Spectrum 4: A communicative course in English".
Englewood Cliffts, NJ:
Prentice Hall Regents,
1984.
Text.