Buchter, Hugo H.,
John Wiley & Sons, 1979
Buku Teks
Lo, S.Y.
The Asian Development Bank, 1985
Buku Teks
edited by Dagmar Caganova, Michal Balog, Lucia Knapcíkova, Jakub Soviar, Serkan Mezarcıoz
Springer Nature, 2019
eBooks
Graff, Heinz
Edition Leipzig, 1972
Buku Teks
McGraw-Hill Book Comp., 1988
Buku Teks