CLARKE PHILIP. (1973). SMALL BUSINESS HOW THEY SURVIVE & SUCCEED. DAVID & CHARLES.
Lua i Stíl Chicago (17ú heag.)CLARKE PHILIP. SMALL BUSINESS HOW THEY SURVIVE & SUCCEED. NEWTON: DAVID & CHARLES, 1973.
Lua MLA (9ú heag.)CLARKE PHILIP. SMALL BUSINESS HOW THEY SURVIVE & SUCCEED. DAVID & CHARLES, 1973.
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