Likert, Rensis, author
New York, McGraw-Hill
Buku Teks
Likert, Rensis, author
McGraw-Hill, 1961
Buku Teks
Likert, Rensis, author
McGraw-Hill Kogakusha, 1967
Buku Teks
Likert, Rensis, author
McGraw-Hill, 1976
Buku Teks
Fulmer, Robert M., author
Macmillan, 1974
Buku Teks