APA Style
HVAC Systems Duct Design. (1981).
Virginia:
SMACNA.
Chicago Style
HVAC Systems Duct Design.
2nd ed.
Virginia:
SMACNA,
1981.
Text.
MLA Style
HVAC Systems Duct Design.
2nd ed.
Virginia:
SMACNA,
1981.
Text.
Turabian Style
HVAC Systems Duct Design.
Virginia:
SMACNA,
1981.
Print.