William Locke, editor
Springer, 2011
Buku Teks
McGraw-Hill, 1973
Buku Teks
edited by H.J. Butcher and Ernest Rudd
McGraw-Hill, 1972
Buku Teks
Deane E. Neubauer, editor
Routledge, 2012
Buku Teks
International Council for Educational Development, 1972
Buku Teks