Richardson, W. Norman, author
Macmillan, 1976
Buku Teks
Sobo, Elisa J., author
Routledge, 2016
Buku Teks
Boughey, Arthur S., author
McMillan Publisher, 1975
Buku Teks
Bennett, Charles F., author
John Wiley & Sons, 1975
Buku Teks
Govorushko, Sergey M., author
Springer, 2012
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