Facing Global Digital Revolution: Proceedings of the 1st International Conference on Economics, Management, and Accounting (BES 2019), July 10, 2019, Semarang, Indonesia

The Future Opportunities and Challenges of Business in Digital Era 4.0: Proceedings of the 2nd International Conference on Economics, Business and Entrepreneurship (ICEBE 2019), November 1, 2019, Bandar Lampung, Indonesia