Gaya APA
dell, M., M., C., F., O. (2001).
ENGLISH VOCABULARY IN USE UPPER-INTERMEDIATE & ADVANCED .
Jakarta:
Erlangga.
Gaya MLA
dell, Michael, Mc, Carthy,, Felicity, O.
"ENGLISH VOCABULARY IN USE UPPER-INTERMEDIATE & ADVANCED".
Jakarta:
Erlangga,
2001.
Buku Inti.