APA
Samuelsson G. &. B. L., . (2009). Drugs of natural origin. Apotekarsocieteten, Sweden: .
Chicago
Samuelsson Gunnar & Bohlin Lars, . 2009. Drugs of natural origin. Apotekarsocieteten, Sweden: .
Harvard
Samuelsson G. &. B. L., . (2009). Drugs of natural origin. Apotekarsocieteten, Sweden: .
MLA
Samuelsson Gunnar & Bohlin Lars, . Drugs of natural origin. Apotekarsocieteten, Sweden: . 2009.