10.34820/FK2/TZKB8F Richasdy, Donni0000-0002-5738-8267(Telkom University) 4 hour work week mind map Telkom University Dataverse 2024 doi:10.34820/FK2/TZKB8F/VLEN5T mind map for book "4 hour work week" Richasdy, Donni(Telkom University)