Gaya APA
LINGUAPHONE (English Course Spoken Exercises). (1989).
Inggris:
Linguaphone Institute Limited.
Gaya Chicago
LINGUAPHONE (English Course Spoken Exercises).
.
Inggris:
Linguaphone Institute Limited,
1989.
Text.
Gaya MLA
LINGUAPHONE (English Course Spoken Exercises).
.
Inggris:
Linguaphone Institute Limited,
1989.
Text.
Gaya Turabian
LINGUAPHONE (English Course Spoken Exercises).
Inggris:
Linguaphone Institute Limited,
1989.
Print.