APA
E. De Clercq, . (1989). Antiviral Research. Amsterdam: Elsevier Science Publishers B.V.
Chicago
E. De Clercq, . 1989. Antiviral Research. Amsterdam: Elsevier Science Publishers B.V.
Harvard
E. De Clercq, . (1989). Antiviral Research. Amsterdam: Elsevier Science Publishers B.V.
MLA
E. De Clercq, . Antiviral Research. Amsterdam: Elsevier Science Publishers B.V. 1989.