Lotus Development Corporation. (1985). 123 release 2: Reference manual. Lotus Development Corporation.
Citazione stile Chigago Style (17a edizione)Lotus Development Corporation. 123 Release 2: Reference Manual. Cambridge, Mass: Lotus Development Corporation, 1985.
Citatione MLA (9a ed.)Lotus Development Corporation. 123 Release 2: Reference Manual. Lotus Development Corporation, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.