ALLSOP, J. (1988). Penguin english tests book 1. Penguin Books.
Chicago-čujuhus (17. p.)ALLSOP, Jake. Penguin English Tests Book 1. London: Penguin Books, 1988.
MLA-čujuhus (9. p.)ALLSOP, Jake. Penguin English Tests Book 1. Penguin Books, 1988.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.