Theodore L. Brown, H. Eugene LeMay, Bruce E. Bursten; editor, Catherin J. Murphy
Prentice-Hall, 2009
Buku Teks
Brown, Theodore L., author
Prentice-Hall, 2000
Buku Teks
Tyrell, L.W.M.
ELBS, 1971
Buku Teks
Silberberg, Martin S., author
McGraw-Hill, 2000
Buku Teks
Sackheim, George I.
Macmillan, 1973
Buku Teks