Author(s) : Dale Carnegie & Associates - Aldy Mardikanto - Veronica Wahyuningkintarsih -

Author(s) : Manampiring, Henry - Innezdhe A. -

Author(s) : Hill, Napoleon -

Author(s) : Dale Carnegie & Associates - Donna Widjajanto - Adella Christabel -

Author(s) : Jamil Azzaini - Sofie Beatrix -

Author(s) : Berger, Jonah - Alex Tri Kantjono Widodo -

Author(s) : Giblin, Les - Y. Dwi Helly Purnomo -

Author(s) : Surianto Rustan -

Author(s) : Manampiring, Henry -

Author(s) : Landung, Sulung - Gaudiamo, Reda - Eka, Anastha - Taufiq, Mohammad -

Author(s) : Situmorang, Agam - Sunarko, Caroline - Sinaga, Derman - Patte, Ika Budiwanti - Simamora, Luhot - Marlina, Marlina - Sembiring, Renni Handayani - Tobing, Rosalynda - Saragih, Srili Oktoria - Nata, Astri - Nababan, Derman P. - Silaban, Dianita - Nababan, Lisnawati - Panjaitan, Mardi - Siburian, Radius - Siagian, Ronny - Silaban, Sabam Sopian - Simanjuntak, Swi Idayati - Dewani H. -

Author(s) : Huling, Jim -

Author(s) : Covey, Stephen R - Colosimo, Jennifer -

Author(s) : Darmawangsa, Darmadi - Suhandi -

Author(s) : Byrne, Rhonda -

Author(s) : Babauta, Leo -