APA (7th ed.) Citation

Alexander, G., & Alexander, M. (1997). Step-by-step watercolour painting : a complete guide to mastering techniques with the Alexander brothers / Gregory and Matthew Alexander: A complete guide to mastering techniques with the Alexander brothers. Phoenix Illustrated.

Chicago Style (17th ed.) Citation

Alexander, Gregory, and Matthew Alexander. Step-by-step Watercolour Painting : A Complete Guide to Mastering Techniques with the Alexander Brothers / Gregory and Matthew Alexander: A Complete Guide to Mastering Techniques with the Alexander Brothers. London: Phoenix Illustrated, 1997.

MLA (9th ed.) Citation

Alexander, Gregory, and Matthew Alexander. Step-by-step Watercolour Painting : A Complete Guide to Mastering Techniques with the Alexander Brothers / Gregory and Matthew Alexander: A Complete Guide to Mastering Techniques with the Alexander Brothers. Phoenix Illustrated, 1997.

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