APA-viite

(1989). Biochemicals organic compounds for research and diagnostic reagents. USA: Sigma chemical company.

Chicago-tyylinen lähdeviittaus

Biochemicals Organic Compounds for Research and Diagnostic Reagents. USA: Sigma chemical company, 1989.

MLA-viite

Biochemicals Organic Compounds for Research and Diagnostic Reagents. USA: Sigma chemical company, 1989.

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