Ross, H. Laurence (Hugh Laurence), author
McGraw-Hill, 1963
Buku Teks
Ross, H. Laurence (Hugh Laurence), author
McGraw-Hill, 1973
Buku Teks
edited by E.C. Cuff; G.C.F. Payne
George Allen and Unwin, 1984
Buku Teks
Cuff, E.C., author
Routledge, 1995
Buku Teks
Lauer, Robert H., author
Allyn and Bacon, 1982
Buku Teks