Ledgard, H. F., Singer, A. C., & Whiteside, J. Directions in human factors for interactive systems. Springer.
Citazione stile Chigago Style (17a edizione)Ledgard, Henry F., Andrew C. Singer, e John Whiteside. Directions in Human Factors for Interactive Systems. Berlin [etc.]: Springer.
Citatione MLA (8a ed.)Ledgard, Henry F., et al. Directions in Human Factors for Interactive Systems. Springer.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.