Gaya APA

Greenberg, H. (2013). How To Hire and Develop Your Next Top Performer : The Qualities That Make Salespeople Great . United State of America: Mc Graw Hill Companies Inc..

Gaya MLA

Greenberg, Herb. "How To Hire and Develop Your Next Top Performer : The Qualities That Make Salespeople Great". United State of America: Mc Graw Hill Companies Inc., 2013. Text.