Hutchinson, T. (1991). English Project 1: Activity book (17th. ed.). Oxford University Press.
Chicago-čujuhus (17. p.)Hutchinson, Tom. English Project 1: Activity Book. 17th. ed. Oxford: Oxford University Press, 1991.
MLA-čujuhus (9. p.)Hutchinson, Tom. English Project 1: Activity Book. 17th. ed. Oxford University Press, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.