APA Style
Samuelson, Paul A, Nordhaus, William D. (1989).
Economics Ed. 13 (Ke-13).
Singapore:
McGraw Hill.
Chicago Style
Samuelson, Paul A, Nordhaus, William D.
Economics Ed. 13.
Ke-13
Singapore:
McGraw Hill,
1989.
Text.
MLA Style
Samuelson, Paul A, Nordhaus, William D.
Economics Ed. 13.
Ke-13
Singapore:
McGraw Hill,
1989.
Text.
Turabian Style
Samuelson, Paul A, Nordhaus, William D.
Economics Ed. 13.
Ke-13
Singapore:
McGraw Hill,
1989.
Print.