Lua APA (7ú heag.)

Chrisholm, R. (1978). Principles of economics. Scott, Froeman and co..

Lua i Stíl Chicago (17ú heag.)

Chrisholm, Roger. Principles of Economics. London: Scott, Froeman and co., 1978.

Lua MLA (9ú heag.)

Chrisholm, Roger. Principles of Economics. Scott, Froeman and co., 1978.

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