[by] Richard L. Scheaffer [and others]
Springer, 1996
Buku Teks
Cornog, Mary Wood, author
Merriam-Webster Inc., 1994
Buku Referensi
Nasar, Syed A., editor
McGraw-Hill, 1992
Buku Referensi
Simanungkalit, Rita M.M., author
Universitas Indonesia, 2008
UI - Tesis (Open)
Syamsuriah, author
Fakultas Kedokteran Universitas Indonesia, 2019
UI - Tesis (Membership)