WALKER, H. M. (1969). Elementary statistical methods. Holt, Rinehart and Winston.
芝加哥风格引文WALKER, Helen M. Elementary Statistical Methods. New York: Holt, Rinehart and Winston, 1969.
MLA引文WALKER, Helen M. Elementary Statistical Methods. Holt, Rinehart and Winston, 1969.
警告：这些引文格式不一定是100％准确.