Cutter, A., & Mc Shane, R. (1998). The Trachten berg speed system of basic mathematics. Rupa & Co., Calcutta.
Čikaški stil citiranjaCutter, Ann, i Rudolph Mc Shane. The Trachten Berg Speed System of Basic Mathematics. Rupa & Co., Calcutta, 1998.
MLA način citiranjaCutter, Ann, i Rudolph Mc Shane. The Trachten Berg Speed System of Basic Mathematics. Rupa & Co., Calcutta, 1998.
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