Gaya APA

Peterson, Patricia Wilcox.. (1997). Changing times, changing tenses with explanation exercises and audio cassette / Patricia Wilcox Peterson . Jakarta: Gramedia Pustaka Utama.

Gaya Chicago

Peterson, Patricia Wilcox.. Changing times, changing tenses with explanation exercises and audio cassette / Patricia Wilcox Peterson. Jakarta: Gramedia Pustaka Utama, 1997. Text.

Gaya MLA

Peterson, Patricia Wilcox.. Changing times, changing tenses with explanation exercises and audio cassette / Patricia Wilcox Peterson. Jakarta: Gramedia Pustaka Utama, 1997. Text.

Gaya Turabian

Peterson, Patricia Wilcox.. Changing times, changing tenses with explanation exercises and audio cassette / Patricia Wilcox Peterson. Jakarta: Gramedia Pustaka Utama, 1997. Print.