Dyfyniad APA

Walker, H. M., & Lev, J. (1958). Elementary statistical methods. Oxford and IBH.

Dyfyniad Arddull Chicago

Walker, Helen M., and Joseph Lev. Elementary Statistical Methods. New Delhi: Oxford and IBH, 1958.

Dyfyniad MLA

Walker, Helen M., and Joseph Lev. Elementary Statistical Methods. Oxford and IBH, 1958.

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