Gaya APA
Lotus 1-2-3 release 3.1 : tutorial. (1990).
Cambridge:
Lotus Development Co.
Gaya Chicago
Lotus 1-2-3 release 3.1 : tutorial.
.
Cambridge:
Lotus Development Co,
1990.
Text.
Gaya MLA
Lotus 1-2-3 release 3.1 : tutorial.
.
Cambridge:
Lotus Development Co,
1990.
Text.
Gaya Turabian
Lotus 1-2-3 release 3.1 : tutorial.
Cambridge:
Lotus Development Co,
1990.
Print.