Fremont, H. (1969). How to teach mathematics in secondary schools. Saunders.
Lua i Stíl Chicago (17ú heag.)Fremont, Herbert. How to Teach Mathematics in Secondary Schools. Philadelphia: Saunders, 1969.
Lua MLA (9ú heag.)Fremont, Herbert. How to Teach Mathematics in Secondary Schools. Saunders, 1969.
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