Gaya APA
Riyanto, S. (2008).
1000 selected verbs used in speaking english .
Gorontalo:
Lanskap Zaman,dan Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"1000 selected verbs used in speaking english".
Gorontalo:
Lanskap Zaman,dan Pustaka Pelajar,
2008.
Text.