Elderton, W. P., & Johnson, N. L. (1969). Systems of frequency curves. Cambridge University.
Chicagoスタイル(17版)引用形式Elderton, William Palin, , Norman Lloyd Johnson. Systems of Frequency Curves. Cambridge: Cambridge University, 1969.
MLA(9版)引用形式Elderton, William Palin, , Norman Lloyd Johnson. Systems of Frequency Curves. Cambridge University, 1969.
警告: この引用は必ずしも正確ではありません.