Yamane, Taro, author
Harper & Row , 1973
Buku Teks
Mendenhall, William, author
Pearson Education, Inc., 2020
Buku Teks
Sigel, Andrew F., author
John Wiley & Sons, 1996
Buku Teks
Chou, Ya-Lun
Rinehart and Winston, 1969
Buku Teks
Dixon, Wilfrid J. (Wilfrid Joseph), author
McGraw-Hill , 1983
Buku Teks