Cita APA (7a ed.)

Sedlak, R. (1991). Phosphorus and nitrogen removal from municipal wastewater principles and (2a ed.). Lewis Publishers, Inc.

Cita Chicago Style (17a ed.)

Sedlak, Richard. Phosphorus and Nitrogen Removal from Municipal Wastewater Principles and. 2a ed. Usa: Lewis Publishers, Inc, 1991.

Cita MLA (9a ed.)

Sedlak, Richard. Phosphorus and Nitrogen Removal from Municipal Wastewater Principles and. 2a ed. Lewis Publishers, Inc, 1991.