Glazer, Nathan, author
Change Magazine Press, 1977
Buku Teks
Department of Health , 1977
Buku Teks
Regan, William
Harper & Row, Publishers, 1970
Buku Teks
Bestor, Arthur
Knopf, 1956
Buku Teks
Conant, James B., author
Oxford University Press, 1946
Buku Teks