FIRTH, M. (1976). Management Of Working Capital Michael Firth. Macmillan.
Lua i Stíl Chicago (17ú heag.)FIRTH, Michael. Management Of Working Capital Michael Firth. Macmillan, 1976.
Lua MLA (8ú heag.)FIRTH, Michael. Management Of Working Capital Michael Firth. Macmillan, 1976.
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