Gaya APA
Keyboards
.
(1993).
tempaterbit:
penerbit.
Gaya Chicago
Keyboards
.
Edisi.
tempaterbit:
penerbit,
1993.
Text.
Gaya MLA
Keyboards
.
Edisi.
tempaterbit:
penerbit,
1993.
Text.
Gaya Turabian
Keyboards
.
tempaterbit:
penerbit,
1993.
Print.