APA Style
Spectrum student book 1 : A Communicative course in english / Diane Warshawsky, Donald R. H. Byrd. (1993).
Semarang:
.
MLA Style
Spectrum student book 1 : A Communicative course in english / Diane Warshawsky, Donald R. H. Byrd.
.
Semarang:
,
1993.
Text.