Dyfyniad APA

THE HELIOS OPERATING.. (1989). The helios operating system: Perihelion software ltd. Prentice Hall.

Dyfyniad Arddull Chicago

THE HELIOS OPERATING.. The Helios Operating System: Perihelion Software Ltd. New York: Prentice Hall, 1989.

Dyfyniad MLA

THE HELIOS OPERATING.. The Helios Operating System: Perihelion Software Ltd. Prentice Hall, 1989.

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