Holden, J. Milnes
Pitman, 1993
Buku Teks
Holden, J. Milnes, author
Pitman, 1971
Buku Teks
Christine Elisia Widjaya, author
Universitas Indonesia, 2012
UI - Skripsi (Open)
Poh, Chu Chai, author
LexisNexis, 2011
Buku Teks
Chorley, Lord, author
Sir Isaac Pitman & Sons, 1960
Buku Teks