edited by Albert Newgardsen
American Management Association, 1959
Buku Teks
Steiner, George A. (George Albert), 1912-, author
Macmillan, 1969
Buku Teks
Davis, Ralph Currier, author
Harper & Brothers, 1951
Buku Teks
edited by C. Edward Weber and Gerald Peters
International Textbook Company, 1969
Buku Teks
[compiled by] Patrick E. Connor, with the collaboration of Theo Haimann, William G. Scott
Houghton-Mifflin, 1978
Buku Teks