HIGGINS, J. M., & HIGGINS, J. M. (1982). Human Relations Concepts And Skills James M. Higgins. Random House.
Lua i Stíl Chicago (17ú heag.)HIGGINS, James M., agus James M. HIGGINS. Human Relations Concepts And Skills James M. Higgins. Random House, 1982.
Lua MLA (8ú heag.)HIGGINS, James M., agus James M. HIGGINS. Human Relations Concepts And Skills James M. Higgins. Random House, 1982.
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