Smart, J. D., & J.M. Swanson. A Promise to keep. Westminster Press.
芝加哥风格引文Smart, James D., 与 J.M. Swanson. A Promise to Keep. Philadelphia: Westminster Press.
MLA引文Smart, James D., 与 J.M. Swanson. A Promise to Keep. Westminster Press.
警告：这些引文格式不一定是100％准确.