Robins, C. Richard, author
Houghton-Miffiln, 1986
Buku Teks
Morris, Percy A.
Houghton Mifflin, 1975
Buku Referensi
Clark, William S., author
Houghton-Miffiln, 1987
Buku Teks
Borror, Donald J., author
Houghton Mifflin, 1976
Buku Referensi
Peterson, Lee Allen, author
Houghton Miffiln, 1977
Buku Teks