James, M.L.
International Textbook , 1965
Buku Teks
Smith, J. C. (James Cruickshanks), 1867-1946, author
English Language Book Society, 1988
Buku Teks
edited by Johan H. Huijsing, Rudy J. van de Plassche, and Willy Sansen
Kluwer Academic, 1993
Buku Teks
Freeman, Roger L.
John Wiley & Sons, 1980
Buku Teks
Balfour, James A. D.
Collins, 1986
Buku Teks