Dyfyniad APA

Elderton, W. P., & Johnson, N. L. (1969). Systems of frequency curves. Cambridge University.

Dyfyniad Arddull Chicago

Elderton, William Palin, and Norman Lloyd Johnson. Systems of Frequency Curves. Cambridge: Cambridge University, 1969.

Dyfyniad MLA

Elderton, William Palin, and Norman Lloyd Johnson. Systems of Frequency Curves. Cambridge University, 1969.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.