Gaya APA
Dwijatmiko, B. (1990).
Communcative grammar practice for first year english department university students .
Yogyakarta:
Kanisius.
Gaya MLA
Dwijatmiko, B.B..
"Communcative grammar practice for first year english department university students".
Yogyakarta:
Kanisius,
1990.
Text.