Stieglitz, F. (1970). Progressive audio lingual drills in english. A Regents Publications.
Chicago-čujuhus (17. p.)Stieglitz, Francine. Progressive Audio Lingual Drills in English. New York: A Regents Publications, 1970.
MLA-čujuhus (9. p.)Stieglitz, Francine. Progressive Audio Lingual Drills in English. A Regents Publications, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.