1.
United States : Earthling Press, c2003.
Second edition.
English | F 67 MEE.P |
2.
3.
Bristol, England : Jordan Pub., c1998.
Second edition.
Danish | G 62 BYR.L |
4.
5.
6.
Deerfield, IL : Clark Boardman Callaghan, c1992.
English | G 62 LIC 1992 |
7.
8.
9.
10.
Alexandria, VA : Licensing Executives Society, 1990.
Revised and updated second printing.
English | G 62 WHI.L |