Bartol, Curt R., author
Pearson Education, Inc., 2008
Buku Teks
Beland, Irene L., author
Macmillan, 1981
Buku Teks
Newman, Barbara M.
Cengage Learning, 2018
Buku Teks
Newman, Barbara M., author
Wadsworth and Cengage Learning, 2012
Buku Teks
Newman, Barbara M., author
Thomson and Wadsworth, 2006
Buku Teks