Gaya APA
Rossi, L, D., Gasser, M.
(1983).
Academic English
.
United States:
Prentice-Hall, Inc., Engleood Cliffs.
Gaya MLA
Rossi, Lee, D.., Gasser, Michael.
"Academic English".
United States:
Prentice-Hall, Inc., Engleood Cliffs,
1983.
Text.