Fowler, F. Parker, author
Wiley, 1962
Buku Teks
Fowler, F. Parker, author
John Wiley & Sons, 1962
Buku Teks
Pintel, Gerald, author
Prentice-Hall, 1989
Buku Teks
Cissell, Robert, author
Houghton Mifflin, 1969
Buku Teks
Lucking, Richard C., author
John Wiley & Sons, 1980
Buku Teks