Gaya APA
Microsoft Excel Version users guide. (1994).
Cambridge:
Microsoft Corporation.
Gaya Chicago
Microsoft Excel Version users guide.
.
Cambridge:
Microsoft Corporation,
1994.
Text.
Gaya MLA
Microsoft Excel Version users guide.
.
Cambridge:
Microsoft Corporation,
1994.
Text.
Gaya Turabian
Microsoft Excel Version users guide.
Cambridge:
Microsoft Corporation,
1994.
Print.