Gaya APA
Executive Calculator Guidebook. (1980).
:
s.n..
Gaya Chicago
Executive Calculator Guidebook.
.
:
s.n.,
1980.
Text.
Gaya MLA
Executive Calculator Guidebook.
.
:
s.n.,
1980.
Text.
Gaya Turabian
Executive Calculator Guidebook.
:
s.n.,
1980.
Print.