SHARMA O.P. (1977). RAILWAYS,BRIDGES &TONNELS. KATSON PUB.HOUSE.
Chicago-čujuhus (17. p.)SHARMA O.P. RAILWAYS,BRIDGES &TONNELS. LUDHIANA: KATSON PUB.HOUSE, 1977.
MLA-čujuhus (9. p.)SHARMA O.P. RAILWAYS,BRIDGES &TONNELS. KATSON PUB.HOUSE, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.