Catalogue Handboek of fine Chemicals. Belgium 1990-1991.

MLA

Aldrich. Catalogue Handboek of Fine Chemicals. Belgium 1990-1991. Brussel, 1990.

APA

Aldrich, A. (1990). Catalogue Handboek of fine Chemicals. Belgium 1990-1991. Brussel.

Chicago

Aldrich Catalogue Handboek of Fine Chemicals. Belgium 1990-1991. Brussel, 1990.