Smith, James Cruickshanks, 1867-1946
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
Hoeschele, David F.
John Wiley & Sons, 1994
Buku Teks