Lua APA (7ú heag.)

Penny, E. M. (1932). The co-operative movement and the consumer. York: National Guild of Co-operators (NGC).

Lua i Stíl Chicago (17ú heag.)

Penny, Edna M. The Co-operative Movement and the Consumer. York: National Guild of Co-operators (NGC), 1932.

Lua MLA (8ú heag.)

Penny, Edna M. The Co-operative Movement and the Consumer. York: National Guild of Co-operators (NGC), 1932.

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