NANNEY, J., & CABLE, J. L. (1976). Developing skills in algebra.-- ed.2. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)NANNEY, J.Louis, agus John L. CABLE. Developing Skills in Algebra.-- Ed.2. Boston: Allyn and Bacon, 1976.
Lua MLA (9ú heag.)NANNEY, J.Louis, agus John L. CABLE. Developing Skills in Algebra.-- Ed.2. Allyn and Bacon, 1976.
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