Sheal, P. R. (1989). How to develop and present staff training courses. Kogan Page ; Nichols Pub..
Lua i Stíl Chicago (17ú heag.)Sheal, Peter R. How to Develop and Present Staff Training Courses. London : New York: Kogan Page ; Nichols Pub., 1989.
Lua MLA (8ú heag.)Sheal, Peter R. How to Develop and Present Staff Training Courses. Kogan Page ; Nichols Pub., 1989.
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