Colin, Fong
Australian Law Librarians` Group, 1988
Buku Teks
Wandelt, Ingo, author
Friedrich Ebert Stiftung (FES) Indonesia Office, 2009
Buku Referensi
Wandelt, Ingo, author
Jakarta, Friderich Ebert Stiftung, 2009
Buku Referensi
Tulloch, Sara
Oxford University Press, 1991
Buku Teks
Houghton Miffin, 1991
Buku Referensi