Gaya APA
DALE, P., WOLF, J, C. (1988).
Speech communication for international students .
Englewood Cliffs:
Prentice Hall Regents.
Gaya MLA
DALE, Paulette., WOLF, James, C..
"Speech communication for international students".
Englewood Cliffs:
Prentice Hall Regents,
1988.
Buku.