Hay, Peter
University of Illinois Press, 1966
Buku Teks
Hill, Norman, author
Harper & Brothers, 1952
Buku Teks
Bowett, D. W. (Derek William), author
Stevens & Sons , 1982
Buku Teks
Bowett, D. W. (Derek William), author
Stevens and Sons, 1975
Buku Teks
Bowett, D. W. (Derek William), author
Stevens and Sons, 1970
Buku Teks