Spencer, John H., author
W.B. Saunders, 1972
Buku Teks
Kwon, Chang-ho, author
Alex Media Komputindo, 2014
Buku Teks
Koshkin, N.I., author
Foreign Languages Pub. House, [1961]
Buku Referensi
edited by Robert Splinter
CRC Pres, 2010
Buku Teks
Nassau, Kurt
John Wiley & Sons, 1983
Buku Teks