(2019). Self-Discipline: Develop Daily Habits to Program Your Mind, Build Mental Toughness, Self-Confidence and WillPower. Independently Published.
Чикаго стиль цитування (17-те видання)Self-Discipline: Develop Daily Habits to Program Your Mind, Build Mental Toughness, Self-Confidence and WillPower. USA: Independently Published, 2019.
Стиль цитування MLA (9-ме видання)Self-Discipline: Develop Daily Habits to Program Your Mind, Build Mental Toughness, Self-Confidence and WillPower. Independently Published, 2019.
Попередження: стилі цитування не завжди правильні на всі 100%.