Williamson, Oliver E., author
Markham, 1967
Buku Teks
Harlan, Neil E., author
Irwin, 1962
Buku Teks
edited by by Harold J. Leavitt and Louise R. Pondy
University of Chicago Press, c1964
Buku Teks
edited by Harold J. Leavitt and Louis R. Pondy
University of Chicago Press, 1964
Buku Teks
Seo, K.K., author
Richard D. Irwin, 1991
Buku Teks