Solberg, Carle
Stanford University Press, 1979
Buku Teks
Taylor, Carl C., author
Loisiana University Press , 1948
Buku Teks
Mclachlan, Noel
Penguin Book, 1989
Buku Teks
Kingston, Jeff, 1957-, author
Wiley Blackwell, 2016
Buku Teks
Fredrickson, George M., author
Univ. of California Press, 2000
Buku Teks