APA (7th ed.) Zitazioa
Gupta,J.B. (2010). A course in power systems (10th ed.). S.K.Kataria.
Chicago Style (17th ed.) Zitazioa
Gupta,J.B. A Course in Power Systems. 10th ed. New Delhi: S.K.Kataria, 2010.
MLA (9th ed.) Zitazioa
Gupta,J.B. A Course in Power Systems. 10th ed. S.K.Kataria, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.