Liaw, ponijan
The art of communication that works
elex media komputindo, 2004
Buku Teks
McGraw-Hill yearbook of science and technology : 1965
McGraw-Hill, 1965
Buku Referensi
Derry, Gregory N.
What science is and how it works
Princeton University Press , 1999
Buku Teks
Kim, Il-sung
Kim Il Sung : Works / 19 January-October 1965
Foreign Languages Pub. House, 1984
Buku Teks
1965
Buku Teks