APA (7th ed.) Citation

Aitken, A. J., McIntosh, A., & Hermann Pálsson. (1971). Edinburgh studies in English and Scots. Longman.

Chicago Style (17th ed.) Citation

Aitken, A. J., Angus McIntosh, and Hermann Pálsson. Edinburgh Studies in English and Scots. London: Longman, 1971.

MLA (8th ed.) Citation

Aitken, A. J., et al. Edinburgh Studies in English and Scots. Longman, 1971.