edited by Kenneth Fidel
Transaction Books, 1975
Buku Teks
United Nations Children's Fund , 1964
Buku Teks
Rianto Nugroho, author
Pustaka Pelajar, 2012
Buku Teks
Weiss, John, author
Prentice-Hall, 1995
Buku Teks
Forsyth, David J.C., author
H.M. Stationery Off., 1979
Buku Teks