Burns, Robert
Harper-Collins, 1995
Buku Teks
P. F. Collier & Son Corporation, 1959
Buku Referensi
Burns, Robert
Longmans, Green and Co. , 1957
Buku Teks
tranlated by Xu Yuanchong
Higher Education Press, 2012
Buku Teks
Gould, Jean
Dodd Mead , 1964
Buku Teks