Gaya APA
Grimnamu, ., Changwon, Y.
(2012).
Why? People Stephen Hawking
.
Jakarta:
PT. Elex Media Komputindo.
Gaya MLA
Grimnamu, ., Changwon, Yoon.
"Why? People Stephen Hawking".
Jakarta:
PT. Elex Media Komputindo,
2012.
Text.