Bolton, Geoffrey
Oxford University Press, 1990
Buku Teks
Orchard, W. Arundel
Georgian House, 1952
Buku Teks
Pechman, Joseph A.
Harvester Wheatsheaf, 1989
Buku Teks
Ward, Barbara
W.W. Norton, 1962
Buku Teks
Kiyosaki, Robert T., 1947-
Gramedia Pustaka Utama, 2019
Buku Teks