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