Johnson, Norman
Voluntary social services
Martin Robertson, 1981
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Busyra Azheri
Corporate social responsibility: dari voluntary menjadi mandatory
RajaGrafindo Persada, 2012
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DeRosa, Thomas F.
Advance in polymer chemistry and methods reported in recent US patents
John Wiley & Sons, 2009
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Dunn, Dana S.
Research methods for social psychology
Wiley-Blackwell, 2009
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Bartholomae, David J.
Mathematical methods in social sciences
John Wiley & Sons, 1981
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