Kohler, Heinz
New York, N.Y. Alfred A. Knoff 1961,
Buku Teks
Kohler, Heinz, author
Frederick A. Praeger, 1965
Buku Teks
Naqvi, Syed Nawab Haider, author
Kegan Paul International, 1993
Buku Teks
Douglas, William O., author
Princeton University Press, 1960
Buku Teks
Douglas, William O., author
Princeton University Press , 1960
Buku Teks