Schubert, Leo, author
Allyn and Bacob, 1972
Buku Teks
by Lucy Pryde Eubanks ... [et.al.]
McGraw-Hill, 2006
Buku Teks
by Mark M. Jones. .. [et al.]
W.B. Saunders, 1972
Buku Teks
Sienko, Michell J., author
McGraw-Hill Kogakusha, 1961
Buku Teks
Busch, Daryle H., author
Allyn and Bacon , 1978
Buku Teks