APA Style

Krugman, P, R. (1990). The age of diminished expectations : U.S. economic policy in the 1990s (1). Cambridge, Mass: MIT Press.

MLA Style

Krugman, Paul, R.. "The age of diminished expectations : U.S. economic policy in the 1990s". 1 Cambridge, Mass: MIT Press, 1990. หนังสือ (Book).