APA (7th ed.) Citation

Blockley, J. (1979). The Challenge of watercolour. Pitman ; Watson-Guptill.

Chicago Style (17th ed.) Citation

Blockley, John. The Challenge of Watercolour. London : New York: Pitman ; Watson-Guptill, 1979.

MLA (9th ed.) Citation

Blockley, John. The Challenge of Watercolour. Pitman ; Watson-Guptill, 1979.