Gaya APA
Lipsey, Richard G.. (1980).
An Introduction to positive ekonomics (5th ed.).
London:
English Language Book Society.
Gaya Chicago
Lipsey, Richard G..
An Introduction to positive ekonomics.
5th ed.
London:
English Language Book Society,
1980.
Text.
Gaya MLA
Lipsey, Richard G..
An Introduction to positive ekonomics.
5th ed.
London:
English Language Book Society,
1980.
Text.
Gaya Turabian
Lipsey, Richard G..
An Introduction to positive ekonomics.
5th ed.
London:
English Language Book Society,
1980.
Print.