Gaya APA
Walker, J, R. (1991).
Worksheets for use with exploring drafting: fundamentals of technology .
South Holland:
The Goodheart-Willcox Co,.
Gaya MLA
Walker, John, R.
"Worksheets for use with exploring drafting: fundamentals of technology".
South Holland:
The Goodheart-Willcox Co,,
1991.
Text.