APA
Lipsey R. G., Chrystal K. A., . (2007). Economics. Oxford: Oxford University Press.
Chicago
Lipsey Richard G, Chrystal K Alec, . 2007. Economics. Oxford: Oxford University Press.
Harvard
Lipsey R. G., Chrystal K. A., . (2007). Economics. Oxford: Oxford University Press.
MLA
Lipsey Richard G, Chrystal K Alec, . Economics. Oxford: Oxford University Press. 2007.