Unknown. (2023). Calendar - Imperial Forest School. Forest Research institute, Dehradun.
Chicago-čujuhus (17. p.)Unknown. Calendar - Imperial Forest School. Forest Research institute, Dehradun, 2023.
MLA-čujuhus (9. p.)Unknown. Calendar - Imperial Forest School. Forest Research institute, Dehradun, 2023.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.