Lua APA (7ú heag.)

Lester, R. K. (1998). The productive edge: How U.S. industries are pointing the way to a new era of economic growth. W.W. Norton.

Lua i Stíl Chicago (17ú heag.)

Lester, Richard K. The Productive Edge: How U.S. Industries Are Pointing the Way to a New Era of Economic Growth. New York: W.W. Norton, 1998.

Lua MLA (9ú heag.)

Lester, Richard K. The Productive Edge: How U.S. Industries Are Pointing the Way to a New Era of Economic Growth. W.W. Norton, 1998.

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