Belmeier Raymond L., author
Fakultas Teknik Universitas Indonesia, 2003
UI - Skripsi (Membership)
Lip, Evelyn, author
Times Books International, 1979
Buku Teks
Lip, Evelyn, author
Times Book International , 1995
Buku Teks
Pegrum, Juliet, author
Three Rivers Press, 2000
Buku Teks
Skinner, Stephen, author
Dahara Prize, 2002
Buku Teks