Cita APA (7th ed.)

Roeper, R., & Friedrich, M. (1985). Short-circuit currents in three-phase systems (2a. ed.). Siemens Aktiengesellschaft: Wiley.

Cita Chicago (17th ed.)

Roeper, Richar, i Mitlehner Friedrich. Short-circuit Currents in Three-phase Systems. 2a. ed. Berlín: Siemens Aktiengesellschaft: Wiley, 1985.

Cita MLA (9th ed.)

Roeper, Richar, i Mitlehner Friedrich. Short-circuit Currents in Three-phase Systems. 2a. ed. Siemens Aktiengesellschaft: Wiley, 1985.