Gaya APA
Kozyrev, J., R. (2002).
TALK IT UP! LISTENING, SPEAKING AND PRONOUNCIATION (Second Edition).
USA:
Cengage Learning.
Gaya MLA
Kozyrev, Joann, Rishel.
"TALK IT UP! LISTENING, SPEAKING AND PRONOUNCIATION".
Second Edition
USA:
Cengage Learning,
2002.
Buku Inti.