VValue PackValue Packde Jurgen Wolff, Fergus O'connellMateriasAttentionTime managementAchievement motivationPsychologyEdiciones (1)Value Pack (2009)Pearson Education, Limited · inglés · ISBN 9781408240137Más obras de Jurgen WolffMarketing for entrepreneurs2009SStundenblätter "Der Untertan"Stundenblätter "Der Untertan"1979Successful scriptwriting1988