Gaya APA
Watson, George G. (1986).
ECONOMICS .
Illinois:
McDougal, Littell & Company.
Gaya Chicago
Watson, George G.
ECONOMICS.
Illinois:
McDougal, Littell & Company,
1986.
Text.
Gaya MLA
Watson, George G.
ECONOMICS.
Illinois:
McDougal, Littell & Company,
1986.
Text.
Gaya Turabian
Watson, George G.
ECONOMICS.
Illinois:
McDougal, Littell & Company,
1986.
Print.