APA (7th ed.) Citation

Lang, A., Way, W. I., & Ward, W. H. (1889). Letters on literature. Longmans, Green.

Chicago Style (17th ed.) Citation

Lang, Andrew, W. Irving Way, and William Hayes Ward. Letters on Literature. London: Longmans, Green, 1889.

MLA (9th ed.) Citation

Lang, Andrew, et al. Letters on Literature. Longmans, Green, 1889.