Swenson, Hugo N.
John Wiley & Sons, 1957
Buku Teks
The Academy of Sciences Malaysia, 2007
Majalah, Jurnal, Buletin
Carelse, Xavier F.
John Wiley & Sons, 1983
Buku Teks
Huszar, George B. de (George Bernard), 1919-1968
Littlefield, Adams, 1959
Buku Teks
Turk, Jonathan
Soundres College Pub., 1984
Buku Teks