Gaya APA
Samuelson, Paul A.. (1970).
Economics (8th).
New York:
McGraw-Hill Book Company.
Gaya Chicago
Samuelson, Paul A..
Economics.
8th
New York:
McGraw-Hill Book Company,
1970.
Text.
Gaya MLA
Samuelson, Paul A..
Economics.
8th
New York:
McGraw-Hill Book Company,
1970.
Text.
Gaya Turabian
Samuelson, Paul A..
Economics.
8th
New York:
McGraw-Hill Book Company,
1970.
Print.