APA (7th ed.) Citation

civil, c., & unknown. (1986). Tertiary wastewater treatment by direct filtration.

Chicago Style (17th ed.) Citation

civil, civil, and unknown. Tertiary Wastewater Treatment by Direct Filtration. 1986.

MLA (9th ed.) Citation

civil, civil, and unknown. Tertiary Wastewater Treatment by Direct Filtration. 1986.

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