Steel, Robert George Douglas, 1917-
Principles and procedures of statistics: a biometrical approach
McGraw-Hill, 1980
 Buku Teks
Noether, Gottfried E.
Introduction to statistics: a nonparametric approach / Gottfried E. Noether
Hoghton Mifflin, 1976
 Buku Teks
Okamura, Hiroyuki
Moment-based approach for some age-based replacement problems
Taylor and Francis, 2017
 Artikel Jurnal
Steel, Robert George Douglas, 1917-
Principles and procedures of statistics : with special reference to the biological sciences
McGraw-Hill, 1960
 Buku Teks
Chase, Clinton I.
Elementary statistical procedures
McGraw-Hill, 1984
 Buku Teks