APA aipamena

Spellman, F. R. (2011). Spellman's Standard handbook for wastewater operators Vol II (Second.).

Chicago Style aipamena

Spellman, Frank R. Spellman's Standard Handbook for Wastewater Operators Vol II. Second. Florida, CRC Press, 2011.

MLA aipamena

Spellman, Frank R. Spellman's Standard Handbook for Wastewater Operators Vol II. Second. 2011.