Hopgood, Alan
Heinemann Educational Australia, 1980
Buku Teks
Allen, Frederick Lewis
Bantam Books, 1961
Buku Teks
Sobolev, Leonid
Moscow : Progress Publishers, 1965
Buku Teks
Sobolev, Leonid
Progress Publishers, 1965
Buku Teks
Robinson, Andrew
Thames & Hudson, 2007
Buku Teks