Gaya APA
World, Animik. (2001).
Alexander Graham Bell .
:
.
Gaya Chicago
World, Animik.
Alexander Graham Bell.
:
,
2001.
Text.
Gaya MLA
World, Animik.
Alexander Graham Bell.
:
,
2001.
Text.
Gaya Turabian
World, Animik.
Alexander Graham Bell.
:
,
2001.
Print.