Wonnacott, Thomas H., 1935-, author
John Wiley & Sons, 1972
Buku Teks
Mood, Alexander McFarlane, 1913-, author
McGraw-Hill , 1974
Buku Teks
Erricker, B.C.
Hodder & Stoughton , 1981
Buku Teks
Freeman, Harold Adolph, author
Addison-Wesley, 1963
Buku Teks
Daniel, Wayne W., author
Houghton Miffiln, 1989
Buku Teks