Richards, Jack C., author
Cambridge University Press, 2017
Buku Teks
edited by Robert Keith Johnson
Cambridge University Press, 1994
Buku Teks
Saylor, J. Galen, author
Holt, Rinehart and Winston, 1981
Buku Teks
Thornton, Geoffrey
Edward Arnold, 1980
Buku Teks
Keating, Sarah B, author
Lippincott Williams & Wilkins, 2006
Buku Teks