Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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