APA-referens (7:e uppl.)

Giardina, E., & Williams, A. (1993). Efficiency in the public sector: The theory and practice of cost-benefit analysis. E. Elgar.

Chicago-referens (17:e uppl.)

Giardina, Emilio, och Alan Williams. Efficiency in the Public Sector: The Theory and Practice of Cost-benefit Analysis. Aldershot, Hants, Eng: E. Elgar, 1993.

MLA-referens (9:e uppl.)

Giardina, Emilio, och Alan Williams. Efficiency in the Public Sector: The Theory and Practice of Cost-benefit Analysis. E. Elgar, 1993.