APA (7th ed.) Citation

Wagner, L., & Ahrens, C. (1991). The abbreviated water conservation working handbook. Edwards Underground Water District.

Chicago Style (17th ed.) Citation

Wagner, Len, and Chuck Ahrens. The Abbreviated Water Conservation Working Handbook. [San Antonio, Tex.]: Edwards Underground Water District, 1991.

MLA (9th ed.) Citation

Wagner, Len, and Chuck Ahrens. The Abbreviated Water Conservation Working Handbook. Edwards Underground Water District, 1991.