Gaya APA
Riyanto, S. (2006, 2007, 2008).
2500 Key Words to be Good at English with Useful Examples .
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"2500 Key Words to be Good at English with Useful Examples".
Yogyakarta:
Pustaka Pelajar,
2006, 2007, 2008.
Text.