Silberg, Richard, author
Harcourt, Brace & World, 1967
Buku Teks
Burns, James McGregor, author
Prentice-Hall, 1972
Buku Teks
Newell, Kenneth W., author
World Health Organization, 1975
Buku Teks
Miller, Wright
E.P. Dutton, 1961
Buku Teks
Burns, James McGregor, author
Prentice-Hall, 1989
Buku Teks