BECK, A., BLEICHER, M. N., & CROWE, D. W. (1969). Excursions into mathematics. Worth pub.
Chicago-čujuhus (17. p.)BECK, Anatole, Michael N. BLEICHER, juo Donald W. CROWE. Excursions into Mathematics. Madison: Worth pub, 1969.
MLA-čujuhus (9. p.)BECK, Anatole, et al. Excursions into Mathematics. Worth pub, 1969.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.