Boston : D. Reidel Publishing
Majalah, Jurnal, Buletin
Edinburgh, Edinburgh University Press, 2005
Buku Referensi
Tubingen : Laupp & Gobel
Majalah, Jurnal, Buletin
Hayakawa, S.I.
Harcout, Brace & World, 1963
Buku Teks
editorial board, Gerald Reid Barry ... [and others] ; illustrated and designed by Hans Erni
Macdonald, 1966
Buku Teks