Djarwanto, author
Liberty, 1986
Buku Teks
Silvestri, Linda Anne, author
Saunders, Elsevier , 2010
Buku Teks
by Luzviminda Casapao [and others]
Barron's Educational Series, 1983
Buku Teks
Wilson, Holly Skodol, author
Addison-Wesley Publishing , 1983
Buku Teks
edited by James Ryan, Ronald F. Tuma
McGraw-Hill , 1996
Buku Teks