Savidge, L. (1973). Revisionary outline of commerce. Pitman Pub.
Lua i Stíl Chicago (17ú heag.)Savidge, Len. Revisionary Outline of Commerce. London: Pitman Pub, 1973.
Lua MLA (9ú heag.)Savidge, Len. Revisionary Outline of Commerce. Pitman Pub, 1973.
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