APA
Daigger G. T., Buttz J. A., . (1998). Upgrading wastewater treatment plants. Lancaster: Technomic Publishing Company.
Chicago
Daigger Glen T, Buttz John A, . 1998. Upgrading wastewater treatment plants. Lancaster: Technomic Publishing Company.
Harvard
Daigger G. T., Buttz J. A., . (1998). Upgrading wastewater treatment plants. Lancaster: Technomic Publishing Company.
MLA
Daigger Glen T, Buttz John A, . Upgrading wastewater treatment plants. Lancaster: Technomic Publishing Company. 1998.