1. Bank Indonesia. (2016) “Profil Bisnis Usaha Mikro, Kecil, dan Menengah (UMKM) [Title in English: Business Profile of Micro, Small And Medium Enterprises (SMEs)].” Lembaga Pengembangan Perbankan Indonesia LPPI.
2. Ministry-of-Industry. (2018) “Indonesia’s Fourth Industrial Revolution Making Indonesia 4.0.” p. 55.
3. “Handbook on Business Process Management 2”, in;Rosemann,2010
4. APQC. (2018) “APQC - 2018.”
5. ER, Mahendrawathi. (2018) Business Process Management, Konsep dan Implementasi, 1st ed., Yogyakarta, Andi.