Gardiner, T., & Borovik, A. (2019). The Essence of Mathematics Through Elementary Problems. Open Book Publishers.
Chicago-viite (17. p.)Gardiner, Tony, ja Alexandre Borovik. The Essence of Mathematics Through Elementary Problems. Open Book Publishers, 2019.
MLA-viite (9. p.)Gardiner, Tony, ja Alexandre Borovik. The Essence of Mathematics Through Elementary Problems. Open Book Publishers, 2019.
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