Wardlaw, Gordon M., 1912-1989
McGraw-Hill, 2000
Buku Teks
Richard S. Kayne, Thomas Leu, Raffaella Zanuttini
Wiley-Blackwell, a John Wiley & Sons, Ltd., publication, 2014
Buku Teks SO
edited by Joel J. Lersier
Englewood Cliffs, N.J., Prentice-Hall
Buku Teks
Sargent, Lyman Tower
Brooks Cole, 1990
Buku Teks SO
Riley E. Dunlap ... et all, editor
Rowman & Littlefield Publishers, INC, 2001
Buku Teks