APA (7th ed.) Citation

Twidwell, S. R. (1984). Intensive survey of San Antonio River segment 1901: Hydrology, field measurements, water chemistry, and biology. Texas Dept. of Water Resources.

Chicago Style (17th ed.) Citation

Twidwell, Steve R. Intensive Survey of San Antonio River Segment 1901: Hydrology, Field Measurements, Water Chemistry, and Biology. Austin, Tex.: Texas Dept. of Water Resources, 1984.

MLA (8th ed.) Citation

Twidwell, Steve R. Intensive Survey of San Antonio River Segment 1901: Hydrology, Field Measurements, Water Chemistry, and Biology. Texas Dept. of Water Resources, 1984.