Jannis, C. Paul
N.Y. John Weley & Sons c. , 1980
Buku Teks
Prichard, James W.
John Wiley & Sons, 1965
Buku Teks
Whitin, Thomson M.
Princeton University Press, 1957
Buku Teks
Mikhael Sakharov Simarmata, author
2013
UI - Skripsi (Membership)
Butters, J. Keith, author
Harvard University Graduate School of Business Administration, 1949
Buku Teks