Covey, Stephen R. (Personal Name)

El líder interior, 2009. port. (Stephen R. Covey)

His Spiritual roots of human relations, 1970.

His Spiritual roots of human relations, c1993: CIP t.p. (Stephen R. Covey) data sheet (b. 10/24/1932)

New York times WWW site, July 17, 2012 (in obituary published July 16: Stephen R. Covey; b. Stephen Richards Covey, Oct. 24, 1932, Salt Lake City; d. Monday [July 16, 2012], Idaho Falls, Idaho, aged 79; won a global following and a five-year run on best-seller lists by fusing the genres of self-help and business literature in his 1989 book The seven habits of highly effective people)

Semʹ navykov vysokoėffektivnykh li︠u︡deĭ, 1998: t.p. (Stiven R. Kovi = Стивен Р. Кови)