APA (7th ed.) Citation

Cotman, J. S., Oppé, A., & Holme, G. (1923). The water-colour drawings of John Sell Cotman. Studio.

Chicago Style (17th ed.) Citation

Cotman, John Sell, A.P Oppé, and Geoffrey Holme. The Water-colour Drawings of John Sell Cotman. London: Studio, 1923.

MLA (9th ed.) Citation

Cotman, John Sell, et al. The Water-colour Drawings of John Sell Cotman. Studio, 1923.