APA Style
Spectrum student book 4 : A Communicative course in english / Diane Warshawsky, Donald R. H. Byrd. (1995).
Semarang:
.
MLA Style
Spectrum student book 4 : A Communicative course in english / Diane Warshawsky, Donald R. H. Byrd.
.
Semarang:
,
1995.
Text.