Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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