Cita APA (7a ed.)

Foro Económico Mundial. (1993). Basic maintenance of circular secondary clarifiers, problem related (1a ed.). Water Environment Federation.

Cita Chicago Style (17a ed.)

Foro Económico Mundial. Basic Maintenance of Circular Secondary Clarifiers, Problem Related. 1a ed. Usa: Water Environment Federation, 1993.

Cita MLA (9a ed.)

Foro Económico Mundial. Basic Maintenance of Circular Secondary Clarifiers, Problem Related. 1a ed. Water Environment Federation, 1993.