Hrebenar, Ronald J
Westview Press, 1986
Buku Teks
edited by P. Loveday, A.W. Martin, and R.S. Parker
Hale and Iremonger, 1977
Buku Teks
edited by P. Loveday, A.W. Martin & R.S. Parker
Hale and Iremonger, 1977
Buku Teks
by by S.R. Davis ... [et al.]
Angus and Robertson, 1954
Buku Teks
Bernstein, Marver H.
Holt, Rinehart and Winston, 1960
Buku Teks