Schwartz, Louis B., author
The Foundation , 1966
Buku Teks
Brown, Ralph S., author
Foundation Press, 2005
Buku Teks
Maguire, John MacArthur
Foundation Press,, 1978
Buku Teks
Mashaw, Jerry L, author
Thomson/West, 2009
Buku Teks
Lockhart, William B., author
West , 1967
Buku Teks