Peterson, P. W. (1996). Changing times, changing tense: With explanation and exercise and audio caset elementary intermediate level. Gramedia Pustaka Utama.
Chicago Style (17th ed.) CitationPeterson, Patricia Wilcox. Changing Times, Changing Tense: With Explanation and Exercise and Audio Caset Elementary Intermediate Level. Gramedia Pustaka Utama, 1996.
MLA (8th ed.) CitationPeterson, Patricia Wilcox. Changing Times, Changing Tense: With Explanation and Exercise and Audio Caset Elementary Intermediate Level. Gramedia Pustaka Utama, 1996.
Warning: These citations may not always be 100% accurate.