Gaya APA
O\'Neil, R., Ramsey, G. (1980).
Classic english : students book with workbook/ Robert O'Neil, Gaymor Ramsey .
Harlo:
Longman.
Gaya MLA
O\'Neil, Robert., Ramsey, Gaymor.
"Classic english : students book with workbook/ Robert O'Neil, Gaymor Ramsey".
Harlo:
Longman,
1980.
Text.