Dyfyniad APA

Helszain, J. (1989). Ferrite phase shifters and control devices. McGraw-Hill.

Dyfyniad Arddull Chicago

Helszain, Joseph. Ferrite Phase Shifters and Control Devices. London: McGraw-Hill, 1989.

Dyfyniad MLA

Helszain, Joseph. Ferrite Phase Shifters and Control Devices. McGraw-Hill, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.