Gaya APA
Costinett...(dkk.), S.
(1994).
Spectrum 2 a Communicative Course in English
.
America:
Prantice Hall Regents.
Gaya MLA
Costinett...(dkk.), Sandra.
"Spectrum 2 a Communicative Course in English".
America:
Prantice Hall Regents,
1994.
Text.