Porteous, Andrew, author
John Wiley & Sons, 1992
Buku Referensi
Henry W. Art, general editor ; foreword by F. Herbert Bormann ; contributing editors, Daniel Botkin [and others]
Henry Holt, 1993
Buku Referensi
McGraw-Hill, 2003
Buku Referensi
Gunton, Tony, author
NCC Blackwell, 1993
Buku Teks
Dorian, A.F., author
Elsevier Scientific Publishing Company, 1981
Buku Referensi