HIMMEL DAVID. (1992). WORKOUT C: LEARN C THROUGH EXERCISES. GALGOTIA PUBLICATIONS.
Chicago-viite (17. p.)HIMMEL DAVID. WORKOUT C: LEARN C THROUGH EXERCISES. NEW DELHI: GALGOTIA PUBLICATIONS, 1992.
MLA-viite (9. p.)HIMMEL DAVID. WORKOUT C: LEARN C THROUGH EXERCISES. GALGOTIA PUBLICATIONS, 1992.
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