Commerma, Broto i
Page One, 2007
Buku Teks
edited by Cyril M. Harris
McGraw-Hill, 1993
Buku Referensi
edited by Cyril M. Harris
McGraw-Hill, 1975
Buku Referensi
Ayers, Chesley, author
McGraw-Hill , 1975
Buku Teks
Ayers, Chesley, author
McGraw-Hill, 1984
Buku Teks