An introduction to positive economics /
Richard G. Lipsey, K. Alec Chrystal.
- 8th ed.
- Oxford ; New York : Oxford University Press, 2004.
- xxiv, 919 p. : col. ill. ; 26 cm.
Rev. ed. of: Principles of economics / Richard G. Lipsey and K. Alec Chrystal. 9th ed. 1999. Various multi-media instructional aids are available to supplement the text.