Gall, J. (1975). Systemantics: How systems work and especially how they fail. Quadrangle.
Citazione stile Chigago Style (17a edizione)Gall, John. Systemantics: How Systems Work and Especially How They Fail. Nueva York: Quadrangle, 1975.
Citatione MLA (9a ed.)Gall, John. Systemantics: How Systems Work and Especially How They Fail. Quadrangle, 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.