APA

Biwater (Firm), . (1993). Biwater. Dorking, Surrey: Biwater Ltd.

Chicago

Biwater (Firm), . 1993. Biwater. Dorking, Surrey: Biwater Ltd.

Harvard

Biwater (Firm), . (1993). Biwater. Dorking, Surrey: Biwater Ltd.

MLA

Biwater (Firm), . Biwater. Dorking, Surrey: Biwater Ltd. 1993.