Barnes & Noble Books, 1969
Buku Teks
by Ronald Freedman [and others]; with a chapter by Guy E. Swanson
Henry Holt, 1952
Buku Teks
Healey, Joseph F., 1945-, author
Pine Forge Press, 1998
Buku Teks
Bonner, Hubert
The Ronald Press, 1959
Buku Teks
Cambridge University Press, 2017
eBooks