Cita APA (7th ed.)

Betz Laboratories Inc. (1991). Betz handbook of industrial water conditioning (9a. ed.). Betz Laboratories Inc.

Cita Chicago (17th ed.)

Betz Laboratories Inc. Betz Handbook of Industrial Water Conditioning. 9a. ed. s.l: Betz Laboratories Inc, 1991.

Cita MLA (9th ed.)

Betz Laboratories Inc. Betz Handbook of Industrial Water Conditioning. 9a. ed. Betz Laboratories Inc, 1991.