(1987). Teaching Mathematics in the Early Childhood Classroom. Alberta Teachers Association.
Chicago-čujuhus (17. p.)Teaching Mathematics in the Early Childhood Classroom. Alberta Teachers Association, 1987.
MLA-čujuhus (9. p.)Teaching Mathematics in the Early Childhood Classroom. Alberta Teachers Association, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.