APA-referens

Shepherd, W., & Shepherd, D. W. (2003). Energy studies (2nd ed.). Imperial College Press.

Chicago-stil citat

Shepherd, W., och D. W. Shepherd. Energy Studies. 2nd ed. London [England]: Imperial College Press, 2003.

MLA-referens

Shepherd, W., och D. W. Shepherd. Energy Studies. 2nd ed. Imperial College Press, 2003.