edited by Henry C. Metcalf and L.F. Urwick
Harper & Brother , 1940
Buku Teks
edited by Robert Teviot Livingston and Stanley H. Milberg
Columbia University Pres, 1957
Buku Teks
edited by Robert Teviot Livingston and Stanley H. Milberg
Colombia University Press , 1957
Buku Teks
Bentzen, Mary M.
McGraw-Hill, 1974
Buku Teks
Thunnusen, Maria, author
Emerald, 2017
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