Prokopenko, J., White, J., Bittel, L., & Eckles, R. (1981). Modular programme for supervisory development. International Labour Office.
Chicago-viite (17. p.)Prokopenko, Joseph, James White, Lester Bittel, ja Robert Eckles. Modular Programme for Supervisory Development. Geneva: International Labour Office, 1981.
MLA-viite (9. p.)Prokopenko, Joseph, et al. Modular Programme for Supervisory Development. International Labour Office, 1981.
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