Dickinson, G. Lowes
George Allen & Unwin LTD, 1946
Buku Klasik
Oakland, John, author
Routledge , 1992
Buku Teks
Oakland, John, author
London; New York Routledge 1992,
Buku Teks
Kiang, Kang Hu, author
Chung Hwa Book, 1935
Buku Teks
Kelly, Howard
Watts & Co., 1946
Buku Teks