THE HELIOS OPERATING.. (1989). The helios operating system: Perihelion software ltd. Prentice Hall.
Style de citation Chicago (17e éd.)THE HELIOS OPERATING.. The Helios Operating System: Perihelion Software Ltd. New York: Prentice Hall, 1989.
Style de citation MLA (9e éd.)THE HELIOS OPERATING.. The Helios Operating System: Perihelion Software Ltd. Prentice Hall, 1989.
Attention : ces citations peuvent ne pas être correctes à 100%.