NEXT EDU. (2016). NEXT SCIENCE - 4 - BOOK A. NEXT EDUCATION.
Chicago-čujuhus (17. p.)NEXT EDU. NEXT SCIENCE - 4 - BOOK A. HYDERABAD: NEXT EDUCATION, 2016.
MLA-čujuhus (9. p.)NEXT EDU. NEXT SCIENCE - 4 - BOOK A. NEXT EDUCATION, 2016.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.