Rose, Richard, 1933-, author
Scott, Foreman, 1989
Buku Teks
Gooch, R.K. (Robert Kent), 1893-1982, author
D. Van Nostrad, 1937
Buku Teks
Lavell, C.F., author
Macmillan, 1919
Buku Teks
Jackson, R.M. (Richard Meredith), 1903-1986, author
University Press, 1953
Buku Teks
Jackson, R.M. (Richard Meredith), 1903-1986, author
Cambridge University Press, 1975
Buku Teks