Adams, Bradley J., author
Elsevier, 2012
Buku Teks
Burt, William Henry, author
Houghton Miffiln, 1976
Buku Referensi
Clark, William S., author
Houghton-Miffiln, 1987
Buku Teks
by Margaret J. Hartman [and others]
Kendall/Hunt, 1976
Buku Teks
Robins, C. Richard, author
Houghton-Miffiln, 1986
Buku Teks