Tansey, Stephen D., author
Routledge, 1996
Buku Teks
Renwick, Alan.
Stanley Thornes Publishing, 1993
Buku Teks
Dahl, Robert A., 1915-2014, author
Harper & Brothers , 1953
Buku Teks
[publisher not identified], 1953
Buku Teks
Timberlake, Karen C, author
Pearson, 2017
Buku Teks