Gaya APA
National Geographic
.
(2011).
:
Dyson Ball.
Gaya Chicago
National Geographic
.
.
:
Dyson Ball,
2011.
Text.
Gaya MLA
National Geographic
.
.
:
Dyson Ball,
2011.
Text.
Gaya Turabian
National Geographic
.
:
Dyson Ball,
2011.
Print.