Bryson, Bill, author
Broadway Books, 2000
Buku Teks
Nowlan, Alden, author
Irwin, 1974
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper & Brothers, 1957
Buku Teks
McKernan, Susan, author
Allen & Unwin, 1989
Buku Teks
Brown, Austin Channing, author
Convergent Books, 2018
Buku Teks