Gaya APA
O'Neil, R.
(1979).
Kernel Lessons Intermediate Students' Book Part A
.
Yogyakarta:
Longman & Kanisius.
Gaya MLA
O'Neil, Robert.
"Kernel Lessons Intermediate Students' Book Part A".
Yogyakarta:
Longman & Kanisius,
1979.
Teksbook.