Gaya APA
M., E., J. (1980).
An Introduction-English Dictionary / Jhon M. Echols, Hassan Shadily .
Jakarta:
PT Gramedia.
Gaya MLA
Echols, Jhon, M..
"An Introduction-English Dictionary / Jhon M. Echols, Hassan Shadily".
Jakarta:
PT Gramedia,
1980.
Textbook.