Widyarani, & Karina, M. "Toward green and sustainable city": 2nd International Symposium on Green Technology for Value Chains 2017 : Balai Kartini, Jakarta, 23-24 October 2017. [Bristol]: IOP Publishing.

"Toward green and sustainable city" : 2nd International Symposium on Green Technology for Value Chains 2017 : Balai Kartini, Jakarta, 23-24 October 2017 / organizer: Dr. Widyarani (chair) [und 8 andere] ; editor in chief: Prof. Myrtha Karina . — [Bristol] : IOP Publishing. — 1 Online-Ressource; Illustrationen. — (IOP conference series Earth and environmental science ; volume 160 (2018))

Widyarani, and Myrtha Karina. "Toward Green and Sustainable City": 2nd International Symposium On Green Technology for Value Chains 2017 : Balai Kartini, Jakarta, 23-24 October 2017.[Bristol]: IOP Publishing.