U.S. Government Printing Office, 1969
Buku Teks
edited by Rick Delbridge and James Lowe
Routledge , 1998
Buku Teks
Smith, T. V.
A Mentor Book, 1960
Buku Teks
Arneson, Ben A
D.Van Nostrand Company, 1938
Buku Teks
Lipson, Leslie, author
Vakils, Feffer and Simons Private, 1964
Buku Teks