by Paul A. Freund [and others]
Little, Brown, 1961
Buku Teks
Areeda, Philip
Little, Brown & Co., 1978
Buku Teks
by Paul A. Freund [and others]
Little, Brown, 1954
Buku Teks
McDonald, Janis L., author
Pearson Education , 2006
Multimedia
Seo, K.K., author
Richard D. Irwin, 1991
Buku Teks