Lua APA (7ú heag.)

PFEIFFER J WILLIAM(ED.). (1989). 1989 ANNUAL DEVELOPING HUMAN RESOURCES. H.R.D UNIVERSITY.

Lua i Stíl Chicago (17ú heag.)

PFEIFFER J WILLIAM(ED.). 1989 ANNUAL DEVELOPING HUMAN RESOURCES. CALIFORNIA: H.R.D UNIVERSITY, 1989.

Lua MLA (9ú heag.)

PFEIFFER J WILLIAM(ED.). 1989 ANNUAL DEVELOPING HUMAN RESOURCES. H.R.D UNIVERSITY, 1989.

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