Gaya APA
O'Dell, M, M, F. (2000).
English vocabulary in use elementary : 60 units of vocabulary reference and practice self-study and classroom use .
England:
erlangga.
Gaya MLA
O'Dell, Michael, McCarthy, Felicity.
"English vocabulary in use elementary : 60 units of vocabulary reference and practice self-study and classroom use".
England:
erlangga,
2000.
Text.