APA-čujuhus (7. p.)

Singh,Soubam Prenchandra. (2018). Eco.tourism environmental problems & sustainable development. Discovery publishing House.

Chicago-čujuhus (17. p.)

Singh,Soubam Prenchandra. Eco.tourism Environmental Problems & Sustainable Development. New Delhi: Discovery publishing House, 2018.

MLA-čujuhus (9. p.)

Singh,Soubam Prenchandra. Eco.tourism Environmental Problems & Sustainable Development. Discovery publishing House, 2018.

Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.