Beach, Dale S., author
Macmillan, 1975
Buku Teks
Sampson, Robert C., author
Harper & Row, 1955
Buku Teks
Hunter, Guy, author
University of London Press, 1961
Buku Teks
edited by by Harold J. Leavitt and Louise R. Pondy
University of Chicago Press, c1964
Buku Teks
edited by Harry W. Karn, B. von Haller Gilmer
McGraw-Hill, 1962
Buku Teks