DAVIDSON JEFFERY P. (1998). ASSERTIVENESS. PRENTICE -HALL INTERNATIONAL, INC.
Chicago-čujuhus (17. p.)DAVIDSON JEFFERY P. ASSERTIVENESS. NEW JERSEY,USA: PRENTICE -HALL INTERNATIONAL, INC, 1998.
MLA-čujuhus (9. p.)DAVIDSON JEFFERY P. ASSERTIVENESS. PRENTICE -HALL INTERNATIONAL, INC, 1998.
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