Terrell, John
Cambridge University PRess, 1988
Buku Teks
Nielsen, Waldemar A., author
Atheneum, 1966
Buku Teks
Gilbert, Erik, author
Pearson Educational, 2004
Buku Teks
Frederick A. Praeger, 1969
Buku Teks
Sudiono, author
1999
UI - Tesis (Membership)