Roethlisberger, F., & Lombard, G. F. (1977). The elusive phenomena. Divison of Research Graduate School of Business Adm. Harvard Univ.
Lua i Stíl Chicago (17ú heag.)Roethlisberger, FJ, agus George F.F Lombard. The Elusive Phenomena. Boston: Divison of Research Graduate School of Business Adm. Harvard Univ, 1977.
Lua MLA (9ú heag.)Roethlisberger, FJ, agus George F.F Lombard. The Elusive Phenomena. Divison of Research Graduate School of Business Adm. Harvard Univ, 1977.
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