Holiday, Ryan
The Obstacle Is the Way: The Timeless Art of Turning Trials into Triumph
Penguin, 2014
Buku Teks
Sharma, Robin
The monk who sold his ferrari: kisah spiritual tentang usaha menggapai impian dan takdir = The monk who sold his Ferrari: a fable about fulfilling your dreams and reaching your destiny
Gramedia Pustaka Utama, 2005
Buku Teks
Gratzon, Fred
Malas tapi sukses: menggapai apa saja tanpa melakukan apa-apa = The lazy way to success
Penerbit Gemilang , 2019
Buku Teks
Hering, Elaine Lin
Unlearning silence : how to speak your mind, unleash talent, and live more fully
Penguin Life, 2024
Buku Teks
Martroni SL.
Kiat membentuk pribadi optimis
Restu Agung, 2005
Buku Teks