M. Ahmad, N. (2006). Conetracting control charts, for cigarettes production, in sulaimani cigarettes factory. , 0(61), 1-18.

Nawzad M. Ahmad. "Conetracting control charts, for cigarettes production, in sulaimani cigarettes factory". , 0, 61, 2006, 1-18.

M. Ahmad, N. (2006). 'Conetracting control charts, for cigarettes production, in sulaimani cigarettes factory', , 0(61), pp. 1-18.

M. Ahmad, N. Conetracting control charts, for cigarettes production, in sulaimani cigarettes factory. , 2006; 0(61): 1-18.