Lua APA (7ú heag.)

Spurr, W. A. (1961). Business and economic statistics (Rev, [i.e. 2d].). Irwin.

Lua i Stíl Chicago (17ú heag.)

Spurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Homewood, Illinois: Irwin, 1961.

Lua MLA (9ú heag.)

Spurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Irwin, 1961.

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