Lua APA (7ú heag.)

Lumsden, K. G. (1963). The gross national product. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Lumsden, Keith G. The Gross National Product. New York: McGraw-Hill, 1963.

Lua MLA (8ú heag.)

Lumsden, Keith G. The Gross National Product. McGraw-Hill, 1963.

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