Gaya APA
MAGGS, Margaret. (1986).
Grolier Programmed English Course 4 .
USA:
Grolier International.
Gaya Chicago
MAGGS, Margaret.
Grolier Programmed English Course 4.
USA:
Grolier International,
1986.
REFERENSI.
Gaya MLA
MAGGS, Margaret.
Grolier Programmed English Course 4.
USA:
Grolier International,
1986.
REFERENSI.
Gaya Turabian
MAGGS, Margaret.
Grolier Programmed English Course 4.
USA:
Grolier International,
1986.
REFERENSI.