Gaya APA
RIYANTO, S.
(2010).
9999% Sukses TOEIC Succesful Strategies
(
1)
.
Yogyakarta:
Pustaka Widyatama.
Gaya MLA
RIYANTO, SLAMET.
"9999% Sukses TOEIC Succesful Strategies".
1
Yogyakarta:
Pustaka Widyatama,
2010.
Text.