Alexander, L. G. (1975). Mainline: Skills A, students' book (1a. ed.). Longman.
Chicago-čujuhus (17. p.)Alexander, Louis George. Mainline: Skills A, Students' Book. 1a. ed. Londres: Longman, 1975.
MLA-čujuhus (9. p.)Alexander, Louis George. Mainline: Skills A, Students' Book. 1a. ed. Longman, 1975.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.