Gupta, A. K. (2016). Grassroots Innovation. Penguin Books.
Chicago-čujuhus (17. p.)Gupta, Anil K. Grassroots Innovation. Gurgaon: Penguin Books, 2016.
MLA-čujuhus (9. p.)Gupta, Anil K. Grassroots Innovation. Penguin Books, 2016.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.