editor, Egon Stahl
Springer-Verlag, 1969
Buku Referensi
Gasparic, Jiri, author
Ellis Horwood, 1978
Buku Referensi
editor, Joseph Sherma, Bernard Fried
Marcel Dekker, 2003
Buku Referensi
Touchstone, Joseph C., author
John Wiley & Sons, 1983
Buku Teks
Svendsen, A. Baerheim, author
Elsevier , 1983
Buku Teks