APA aipamena

Shepherd, W., & Shepherd, D. W. (2008). Problems and solutions: Energy studies. Imperial College Press.

Chicago Style aipamena

Shepherd, W., and D W. Shepherd. Problems and Solutions: Energy Studies. London: Imperial College Press, 2008.

MLA aipamena

Shepherd, W., and D W. Shepherd. Problems and Solutions: Energy Studies. Imperial College Press, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.