WALKER, E., & ELSWIRTH, S. (1990). Grammar practice for intermediate students. Binarupa Aksara.
芝加哥风格引文WALKER, Elaine, 与 Steve ELSWIRTH. Grammar Practice for Intermediate Students. Jakarta: Binarupa Aksara, 1990.
MLA引文WALKER, Elaine, 与 Steve ELSWIRTH. Grammar Practice for Intermediate Students. Binarupa Aksara, 1990.
警告：这些引文格式不一定是100％准确.