Budapest : Akadémiai Kiad, 1976
Buku Teks
Ropke, Wilhelm
Eugen Rentsch Verlag, 1961
Buku Teks
Perlman, Richard, author
Dryden Press, 1972
Buku Teks
Baumol, William J., author
Harper & Brother Publisher, 1954
Buku Teks
Hansen, Alvin H. (Alvin Harvey), 1887-1975, author
McGraw-Hill, 1947
Buku Teks