Pym, Christopher, author
Robert Hale Limited, 195?
Buku Teks
Grossman, Valerie G. A., author
J.B. Lippincott, 2003
Buku Teks
Choi, Jun Sik., author
Singongsa, 2009
Buku Teks
Universitas Indonesia, 2004
UI - Skripsi (Membership)
Skrotzki, Bernhardt G.A.
Tata McGraw-Hill, 1982
Buku Teks