Lua APA (7ú heag.)

Não informado. (1992). Journal of Agricultural and Resource Economics. Western Agricultural Economics Association.

Lua i Stíl Chicago (17ú heag.)

Não informado. Journal of Agricultural and Resource Economics. Bozeman, Mont: Western Agricultural Economics Association, 1992.

Lua MLA (8ú heag.)

Não informado. Journal of Agricultural and Resource Economics. Western Agricultural Economics Association, 1992.

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