Gaya APA
Etherton, A.R.B. (1975).
Objective English Tests Elementary Level (Cet. 1.--).
Yogyakarta:
Kanisius.
Gaya Chicago
Etherton, A.R.B.
Objective English Tests Elementary Level.
Cet. 1.--
Yogyakarta:
Kanisius,
1975.
Text.
Gaya MLA
Etherton, A.R.B.
Objective English Tests Elementary Level.
Cet. 1.--
Yogyakarta:
Kanisius,
1975.
Text.
Gaya Turabian
Etherton, A.R.B.
Objective English Tests Elementary Level.
Cet. 1.--
Yogyakarta:
Kanisius,
1975.
Print.