Lipsey, R. C. (1999). Principles of Economics (1st.). Oxford University Press.
Chicago Style aipamenaLipsey, Richard; Chrystal. Principles of Economics. 1st. Oxford: Oxford University Press, 1999.
MLA aipamenaLipsey, Richard; Chrystal. Principles of Economics. 1st. Oxford University Press, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.