Gaya APA
Dixson, R, J.
(1992).
Modern American English Workbook 4 New Edition
.
Englewood Cliffs:
Prentice-Hall.
Gaya MLA
Dixson, Robert, J..
"Modern American English Workbook 4 New Edition".
Englewood Cliffs:
Prentice-Hall,
1992.
Book.