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