RYCKMAN W G. (1993). COMPENSATING YOUR SALES FORCE. JAICO PUBLISHING HOUSE.
Lua i Stíl Chicago (17ú heag.)RYCKMAN W G. COMPENSATING YOUR SALES FORCE. MUMBAI: JAICO PUBLISHING HOUSE, 1993.
Lua MLA (9ú heag.)RYCKMAN W G. COMPENSATING YOUR SALES FORCE. JAICO PUBLISHING HOUSE, 1993.
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