APA (7th ed.) Citation

Smith, I. C., MacCaig, N., & Brown, G. M. (1972). Iain Crichton Smith, Norman MacCaig, George Mackay Brown. Penguin Books.

Chicago Style (17th ed.) Citation

Smith, Iain Crichton, Norman MacCaig, and George Mackay Brown. Iain Crichton Smith, Norman MacCaig, George Mackay Brown. [Harmondsworth, Eng.]: Penguin Books, 1972.

MLA (8th ed.) Citation

Smith, Iain Crichton, et al. Iain Crichton Smith, Norman MacCaig, George Mackay Brown. Penguin Books, 1972.