Gaya APA
Costinett, Sandra. (1985).
Spectrum 5: A Communicative Course in English .
New York:
Prentice Hall Inc.
Gaya Chicago
Costinett, Sandra.
Spectrum 5: A Communicative Course in English.
New York:
Prentice Hall Inc,
1985.
.
Gaya MLA
Costinett, Sandra.
Spectrum 5: A Communicative Course in English.
New York:
Prentice Hall Inc,
1985.
.
Gaya Turabian
Costinett, Sandra.
Spectrum 5: A Communicative Course in English.
New York:
Prentice Hall Inc,
1985.
.