Barlet, Robert Merrill
Keng Po, 1959
Buku Teks
Decker, William Merrill
University of North Carolina Press, 1990
Buku Teks
Ogdin, Carol Anne
Prentice-Hall, 1978
Buku Teks
Oates, Joyce Carol
The Vanguard, 1963
Buku Teks
Berens, Carol
Mcgraw-Hill, 1997
Buku Teks