Jangan Menjual Jika Tidak Tahu Ilmunya (Indonesian Edition)

Synopsis: This book is simple. It's about the science of how to sell. The capitals are: bravery, politeness, perseverance, friendliness, and helpfulness, not shy, knowledgeable, smart in suppressing emotion, confident, good appearance, and willing to be complained. (http://www.gramediainternational.com/book/detail/9789792750836)