Gaya APA
Duelm, B, R.
(1989).
Answer key for: computer - aided drafting
.
South Holland:
The Goodheart-Willcox Co,.
Gaya MLA
Duelm, Brian, R.
"Answer key for: computer - aided drafting".
South Holland:
The Goodheart-Willcox Co,,
1989.
Text.