Ramage, Janet, 1932-, author
Oxford University Press, 1983
Buku Teks
Rukl, Antonin, author
Sterling Publishing Co., 1999
Buku Referensi
Hecht, Jeff, author
McGrawHill, 1986
Buku Referensi
Seelye, H. Ned
National Textbook, 1976
Buku Teks
Bates, Tony, 1939-, author
Jossey-Bass, 2011
Buku Teks