by Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1962
Buku Teks
edited by by Harold J. Leavitt and Louise R. Pondy
University of Chicago Press, c1964
Buku Teks
Bendix, Reinhard
John Wiley & Sons, 1956
Buku Teks
Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1945
Buku Teks
Brown, Wilfred
Heinemann, 1971
Buku Teks