Elgar, Frank
Frederick A Praeger Publishirs, 1958
Buku Teks
Brubaker, Sterling, author
A Mentor Book, 1972
Buku Teks
Elsevier, 2013
eBooks
Taylor, A.E. (Alfred Edward), 1869-1945, author
University Paperbacks, 1960
Buku Teks
Moscow Foreign Languages Publishing House 1959
Buku Teks