Koestler, Arthur, author
Victor Gollancz, 1937
Buku Teks
Payne, Stanley G., author
W.W. Norton, 1970
Buku Teks
Needham, Joseph
Cambridge University Press, 1971
Buku Teks
Webb, Sidney, author
Longman, 1947
Buku Teks
Eckersley, C. E. (Charles Ewart), 1892-1967, author
Longmans, Green and Co., 1953
Buku Referensi