Riyanto, S. (2008). The First Things First English Vocabulary: 1000 Selected Adjectives, Adverbs, Prepositions Used In Speaking English. Pustaka Pelajar.
Chicago Style (17th ed.) CitationRiyanto, Slamet. The First Things First English Vocabulary: 1000 Selected Adjectives, Adverbs, Prepositions Used In Speaking English. Pustaka Pelajar, 2008.
MLA (8th ed.) CitationRiyanto, Slamet. The First Things First English Vocabulary: 1000 Selected Adjectives, Adverbs, Prepositions Used In Speaking English. Pustaka Pelajar, 2008.
Warning: These citations may not always be 100% accurate.