Smith, Thomas C., author
Standford University Press, 1965
Buku Teks
Smith, Thomas C., author
Standford University Press, 1959
Buku Teks
Havens, Thomas R.H., author
Princeton University Press, 1974
Buku Teks
White, James L., author
Washington Square Press, 1966
Buku Teks
edited by Charles K. Warner
Macmillan, 1966
Buku Teks