Citazione Stile APA (7a Edizione)

Johnston, R. J. (1976). The World trade system: Some enquires into its spatial structure. G. Bell.

Citazione stile Chigago Style (17a edizione)

Johnston, R. J. The World Trade System: Some Enquires into Its Spatial Structure. London: G. Bell, 1976.

Citatione MLA (9a ed.)

Johnston, R. J. The World Trade System: Some Enquires into Its Spatial Structure. G. Bell, 1976.