Gaya APA
Halliday, ., Walker, R.
(2011).
Principles of physics
(
Ed.9)
.
California:
Wilay Plus.
Gaya MLA
Halliday, ., Walker, Resnick,Jearl.
"Principles of physics".
Ed.9
California:
Wilay Plus,
2011.
Textbook.