Downie, N. M.
Harper & Row, Pub., 1974
Buku Teks
Peck, Roxy., author
Cebgage Learning, 2016
Buku Teks
Tukey, John Wilder, 1915-, author
Addison-Wesley, 1977
Buku Teks
Yamane, Taro, author
Harper & Row , 1973
Buku Teks
Mendenhall, William, author
Pearson Education, Inc., 2020
Buku Teks