Freeman, D. E., & Freeman, Y. S. (1994). Between worlds: Access to second language acquisition. Heinemann.
芝加哥风格引文Freeman, David E., 与 Yvonne S. Freeman. Between Worlds: Access to Second Language Acquisition. Postsmouth, NH: Heinemann, 1994.
MLA引文Freeman, David E., 与 Yvonne S. Freeman. Between Worlds: Access to Second Language Acquisition. Heinemann, 1994.
警告：这些引文格式不一定是100％准确.