Wallace, Robert, author
Time-Life Books, 1967
Buku Teks
Remington, Thomas F., 1948-, author
Pearson Longman, 2012
Buku Teks
Riasanovsky, Nicholas V., author
Oxford University Press, 1963
Buku Teks
Riasanovsky, Nicholas V., author
Oxford University Press, 2011
Buku Teks
Halasz, Nicholas, author
Ronald Press, 1959
Buku Teks