Gaya APA

Pierskalla, W, P. (1980). Operations research volume 28 number 1 January-February 1980 . Amerika Serikat: Operation Research Society of America.

Gaya MLA

Pierskalla, William, P.. "Operations research volume 28 number 1 January-February 1980". Amerika Serikat: Operation Research Society of America, 1980. Art Original.