Não informado. (1972). Utilitas mathematica. University of Manitoba, Department of Computer Science.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Utilitas Mathematica. Winnipeg, Canada: University of Manitoba, Department of Computer Science, 1972.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Utilitas Mathematica. University of Manitoba, Department of Computer Science, 1972.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.