Gallagher, N. Delta's next generation toefel test. Delta publishing company.
Chicago-čujuhus (17. p.)Gallagher, Nancy. Delta's Next Generation Toefel Test. New York: Delta publishing company.
MLA-čujuhus (9. p.)Gallagher, Nancy. Delta's Next Generation Toefel Test. Delta publishing company.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.