edited by Sidney Hook
University Press, 1969
Buku Teks
Schlegel, Friedrich Von, author
Cambridge University Press, 2015
eBooks
Boston : D. Reidel Publishing
Majalah, Jurnal, Buletin
Thomas Cable
Prentice-Hall, 1993
Buku Teks
Edinburgh, Edinburgh University Press, 2005
Buku Referensi