Gaya APA
Purwoko, ., Fendi, .
(2009).
Physics for senior high school year x
.
Surabaya:
Yudhistira.
Gaya MLA
Purwoko, ., Fendi, .
"Physics for senior high school year x".
Surabaya:
Yudhistira,
2009.
BUKU TEKS.