Gaya APA
Riyanto, S. (2008).
1000 SELECTED ADJECTIVES ADVERBS PREPOSITIONS USED IN SPEAKING ENGLISH .
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"1000 SELECTED ADJECTIVES ADVERBS PREPOSITIONS USED IN SPEAKING ENGLISH".
Yogyakarta:
Pustaka Pelajar,
2008.
Buku Inti.