Gaya APA
Spencer, Henry Cecil. (1974).
Basic technical drawing .
New York:
Macmillan.
Gaya Chicago
Spencer, Henry Cecil.
Basic technical drawing.
New York:
Macmillan,
1974.
Tesis.
Gaya MLA
Spencer, Henry Cecil.
Basic technical drawing.
New York:
Macmillan,
1974.
Tesis.
Gaya Turabian
Spencer, Henry Cecil.
Basic technical drawing.
New York:
Macmillan,
1974.
Tesis.