APA (7th ed.) Citation

Douglas, I. (1968). Field methods of water hardness determination. Geo Abstracts.

Chicago Style (17th ed.) Citation

Douglas, Ian. Field Methods of Water Hardness Determination. Norwich: Geo Abstracts, 1968.

MLA (9th ed.) Citation

Douglas, Ian. Field Methods of Water Hardness Determination. Geo Abstracts, 1968.

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