BARLOW D. &. H. M., . (1984). SINGLE CASE EXPERIMENTAL DESIGNS. : PREGAMON PRESS,NEW YORK.
BARLOW DAVID & HERSEN MICHEL, . 1984. SINGLE CASE EXPERIMENTAL DESIGNS. : PREGAMON PRESS,NEW YORK.
BARLOW DAVID & HERSEN MICHEL, . SINGLE CASE EXPERIMENTAL DESIGNS. : PREGAMON PRESS,NEW YORK. 1984.
