APA (7th ed.) Citation

Harper, R., Milner, R., & Tofte, M. (1987). The semantics of standard ML, version 1.

Chicago Style (17th ed.) Citation

Harper, Robert, Robin Milner, and Mads Tofte. The Semantics of Standard ML, Version 1. Edinburgh, 1987.

MLA (9th ed.) Citation

Harper, Robert, et al. The Semantics of Standard ML, Version 1. 1987.