APA (7th ed.) Citation

civil, c., & unknown. (1989). Tertiary treatment of municipal sewage via slow sand filtration.

Chicago Style (17th ed.) Citation

civil, civil, and unknown. Tertiary Treatment of Municipal Sewage via Slow Sand Filtration. 1989.

MLA (9th ed.) Citation

civil, civil, and unknown. Tertiary Treatment of Municipal Sewage via Slow Sand Filtration. 1989.

Warning: These citations may not always be 100% accurate.