APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Shepherd, W., and D. W. Shepherd. Energy Studies. 2nd ed. London: Imperial College Press, 2003.

MLA (8th ed.) Citation

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