APA
Lipsey & Chrystal, . (2011). Economics. United Kingdom: Oxford University Press.
Chicago
Lipsey & Chrystal, . 2011. Economics. United Kingdom: Oxford University Press.
Harvard
Lipsey & Chrystal, . (2011). Economics. United Kingdom: Oxford University Press.
MLA
Lipsey & Chrystal, . Economics. United Kingdom: Oxford University Press. 2011.