ENGLISH, R. (2013). Teaching calculation: Audit & test. SAGE.
Chicago-čujuhus (17. p.)ENGLISH, Richard. Teaching Calculation: Audit & Test. SAGE, 2013.
MLA-čujuhus (9. p.)ENGLISH, Richard. Teaching Calculation: Audit & Test. SAGE, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.