Dubisch, Roy
John Wiley & Sons, 1963
Buku Teks
Miller, Julie, author
McGraw-Hill, Higher Education, 2008
Buku Teks
Rees, Paul K., author
McGraw-Hill , 1971
Buku Teks
Wooton, William, author
Wadsworth, 1968
Buku Teks
Wooton, William, author
Wadsworth, 1965
Buku Teks