APA (7th ed.) Citation

Severn-Trent Water Authority. Directorate of Scientific Services. (1980). The ecology of the Afon Vyrnwy. Severn-Trent Water Authority.

Chicago Style (17th ed.) Citation

Severn-Trent Water Authority. Directorate of Scientific Services. The Ecology of the Afon Vyrnwy. Severn-Trent Water Authority, 1980.

MLA (9th ed.) Citation

Severn-Trent Water Authority. Directorate of Scientific Services. The Ecology of the Afon Vyrnwy. Severn-Trent Water Authority, 1980.

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