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Die Sozialpolitik des Handelsstandes und das deutsche Handelsgesetzbuch
Heine, Wolfgang, (1897)
Drepturi, obligaţii şi răspunderi ale personalului muncitor din comerţul socialist : culegere de acte normative
(1978)
Measuring salesmen's performance
(1965)
Linking top-level planning to salesman performance
Katzenbach, Jon R., (1966)
Teams at the top : unleashing the potential of both teams and individual leaders
Katzenbach, Jon R., (1998)