Oxford University Press, 1997
Buku Teks
by Kenneth A. Dahlberg [and others]
Duke University Press, 1985
Buku Teks
Kremere, Eva, author
Emerald Publishing Limited, 2020
eBooks
Huntley, James R., author
NATO Information Service, 1972
Buku Teks
Rowland, Anthony J.
Edward Arnold, 1985
Buku Teks