Solórzano, h. S., & Schmidt, J. P. L. (1998). NorthStar: Focus on listening and speaking, intermediate. Longman.
Chicago-čujuhus (17. p.)Solórzano, helen S., juo Jennifer P. L. Schmidt. NorthStar: Focus on Listening and Speaking, Intermediate. Nueva York: Longman, 1998.
MLA-čujuhus (9. p.)Solórzano, helen S., juo Jennifer P. L. Schmidt. NorthStar: Focus on Listening and Speaking, Intermediate. Longman, 1998.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.