Hergenhahn, B.R., 1934-, author
Wadsworth, 2014
Buku Teks
Lawson, Robert B., author
Routledge & Francis Group, 2018
Buku Teks
Hertz, Frederick
Routledge & Kegan Paul Ltd., 1957
Buku Teks
Hertz, Frederick
Oxford University Press, 1944
Buku Teks
Brennan, James F., author
Rajawali, 2012
Buku Teks