Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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