Deroche, A. G., author
Prentice-Hall, 1996
Buku Teks
Wait, Donald
Angus & Robertson, 1971
Buku Teks
Markus, John, 1911-, author
McGraw-Hill, 1961
Buku Teks
Nourse, Alan E.
Time Incorporated, 1964
Buku Referensi
Homan, Welmoed
Wolters-Noordhoff, 1999
Buku Teks