Gaya APA
Shrader, R, L. (1991).
Answer key to accompany : electronic communication (6).
Illionis:
Gleancoe Divison Macmilan.
Gaya MLA
Shrader, Robert, L.
"Answer key to accompany : electronic communication".
6
Illionis:
Gleancoe Divison Macmilan,
1991.
Text.