Seidman, D. (2012). The secret language of influence: Master the one skill every sales pro needs. American Management Association.
Cita Chicago Style (17a ed.)Seidman, Dan. The Secret Language of Influence: Master the One Skill Every Sales Pro Needs. New York: American Management Association, 2012.
Cita MLA (8a ed.)Seidman, Dan. The Secret Language of Influence: Master the One Skill Every Sales Pro Needs. American Management Association, 2012.
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