Taylor and Francis, 1997
Buku Teks
McNeill, Patrick, author
Routledge, 1990
Buku Teks
Guilford, Joy Paul, 1897-1987, author
McGraw-Hill, 1954
Buku Teks
White, Theresa L., author
Wadsworth and Cengage Learning, 2013
Buku Teks
McNeill, Patrick, author
Routledge, 1999
Buku Teks