APA-referens

Halm, G. N. (1960). Economic systems: A comparative analysis. Oxford & IBH Publshing Co.

Chicago-stil citat

Halm, George N. Economic Systems: A Comparative Analysis. Calcutta: Oxford & IBH Publshing Co, 1960.

MLA-referens

Halm, George N. Economic Systems: A Comparative Analysis. Oxford & IBH Publshing Co, 1960.