APA-viite (7. p.)

Duffy, M. C. (2003). Electric railways 1880-1990. Institution of Engineering and Technology. https://doi.org/10.1049/PBHT031E

Chicago-viite (17. p.)

Duffy, M. C. Electric Railways 1880-1990. London, United Kingdom: Institution of Engineering and Technology, 2003. https://doi.org/10.1049/PBHT031E.

MLA-viite (9. p.)

Duffy, M. C. Electric Railways 1880-1990. Institution of Engineering and Technology, 2003. https://doi.org/10.1049/PBHT031E.