Dinas Penerbitan Balai Pustaka, 1957
Buku Referensi
Nemmers, Erwin Esser, author
Littlefield, Adam and Co., 1960
Buku Teks
Rutherford, Donald, author
Routledge, 1992
Buku Referensi
general editor, David W. Pearce
Macmillan Reference Books, 1989
Buku Referensi
Bannock, G., author
Penguin Books, 1974
Buku Referensi