Cita APA (7a ed.)

Permutit Company. (1949). Water conditioning handbook (3a ed.). [s.n.].

Cita Chicago Style (17a ed.)

Permutit Company. Water Conditioning Handbook. 3a ed. New York: [s.n.], 1949.

Cita MLA (9a ed.)

Permutit Company. Water Conditioning Handbook. 3a ed. [s.n.], 1949.