KUMAR, A. (2012). Aquatic ecosystem. Discovery Publishers.
Chicago-čujuhus (17. p.)KUMAR, Ashok. Aquatic Ecosystem. Discovery Publishers, 2012.
MLA-čujuhus (9. p.)KUMAR, Ashok. Aquatic Ecosystem. Discovery Publishers, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.