Gaya APA
Etherton, A.
(1975).
Objective english tests/ A.R.B. Etherton
.
Yogyakarta:
Kanisius.
Gaya MLA
Etherton, A.R.B..
"Objective english tests/ A.R.B. Etherton".
Yogyakarta:
Kanisius,
1975.
Text.