Hewlett-Packard Company. (1980). HP-41: Users' library solutions : structural design. Hewlett-Packard.
Chicago-referens (17:e uppl.)Hewlett-Packard Company. HP-41: Users' Library Solutions : Structural Design. [United States]: Hewlett-Packard, 1980.
MLA-referens (8:e uppl.)Hewlett-Packard Company. HP-41: Users' Library Solutions : Structural Design. Hewlett-Packard, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.