APA (7th ed.) Citation

Blockley, J. (1983). The challenge of watercolour / John Blockley. Black.

Chicago Style (17th ed.) Citation

Blockley, John. The Challenge of Watercolour / John Blockley. London: Black, 1983.

MLA (9th ed.) Citation

Blockley, John. The Challenge of Watercolour / John Blockley. Black, 1983.

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