Gaya APA
Samuelson, Paul A.. (1961).
Economics an introductory analysis (text).
New York:
Mc Graw Hill.
Gaya Chicago
Samuelson, Paul A..
Economics an introductory analysis.
text
New York:
Mc Graw Hill,
1961.
.
Gaya MLA
Samuelson, Paul A..
Economics an introductory analysis.
text
New York:
Mc Graw Hill,
1961.
.
Gaya Turabian
Samuelson, Paul A..
Economics an introductory analysis.
text
New York:
Mc Graw Hill,
1961.
.