edited by Don Crewe, Ronnie Lippens
Routledge, 2015
Buku Teks
Adler, Freda, author
McGraw-Hill, 1991
Buku Teks
Siegel, Larry J., 1959-, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Adler, Freda, author
McGraw-Hill, 1998
Buku Teks
Taft, Donald R., author
Macmillan, 1964
Buku Teks