Gaya APA
O'Neill, R.
(1990).
American Kernel Lessons: AKL Beginning Student's Book
(
Edisi 1)
.
Jakarta:
Pustaka Jaya.
Gaya MLA
O'Neill, Robert.
"American Kernel Lessons: AKL Beginning Student's Book".
Edisi 1
Jakarta:
Pustaka Jaya,
1990.
Text.