Παραπομπή APA

Spellman, F. R., & Whiting, N. E. (1999). Water pollution control technology: Concepts and applications. Rockville, MD.: Government Insitutes.

Παραπομπή Chicago Style

Spellman, Frank R., and Nancy E. Whiting. Water Pollution Control Technology: Concepts and Applications. Rockville, MD.: Government Insitutes, 1999.

Παραπομπή MLA

Spellman, Frank R., and Nancy E. Whiting. Water Pollution Control Technology: Concepts and Applications. Rockville, MD.: Government Insitutes, 1999.

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