Cooper, Donald R., author

Metode penelitian bisnis= Business research methods

Erlangga, 1996

Buku Teks

Pengantar metode penelitian=an introduction to research methods

UI-Press , 1993

Buku Teks

Metodologi penelitian kesehatan : penuntun latihan metode penelitian = Health research methodology : a guide for training in research methods

Departemen Kesehatan, 1999

Buku Teks

Cooper, Donald R., author

Business research methods

McGraw-Hill, 1998

Buku Teks

Cooper, Donald R., author

Business research methods

McGraw-Hill, 2001

Buku Teks

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