Purayil A.V. Advanced Educational Technology. APH Publishing.
Chicago-čujuhus (17. p.)Purayil A.V. Advanced Educational Technology. New Delhi: APH Publishing.
MLA-čujuhus (9. p.)Purayil A.V. Advanced Educational Technology. APH Publishing.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.