Solikhin_Zero_to_Hero & Hartono, K. P. (2010). Spiritual problem solving: Jangan kalah oleh masalah. Pro-U Media.
Chicago Style (17th ed.) CitationSolikhin_Zero_to_Hero and Kang Puji Hartono. Spiritual Problem Solving: Jangan Kalah Oleh Masalah. Pro-U Media, 2010.
MLA (8th ed.) CitationSolikhin_Zero_to_Hero and Kang Puji Hartono. Spiritual Problem Solving: Jangan Kalah Oleh Masalah. Pro-U Media, 2010.
Warning: These citations may not always be 100% accurate.