Keneally, Thomas, 1935-, author
Collins, 1975
Buku Teks
Keneally, Thomas, 1935-, author
Cornet, 1984
Buku Teks
Ratcliff, Richard U., author
McGraw-Hill, 1949
Buku Teks
edited by W.L. Gibson, Jr, R.J. Hildreth, Gene Wunderlich
University of Nebraska Press, 1966
Buku Teks
Ely, Richard T., author
Macmillan, 1924
Buku Teks