Brown, A.J., author
George Allen & Unwin, 1951
Buku Teks
Brown, A.J., author
George Allen and Unwin, 1959
Buku Teks
Brown, A.J., author
George Allen and Unwin, 1959
Buku Klasik
Brown, E.H. Phelps, author
Sir Isaac Pitman & Sons, 1953
Buku Teks
Schiller, Bradley R., author
Prentice-Hall, 1975
Buku Teks