APA (7th ed.) Citation

Hofmann, M., & Pierce, B. C. (1992). An abstract view of objects and subtyping: (preliminary report).

Chicago Style (17th ed.) Citation

Hofmann, Martin, and Benjamin C. Pierce. An Abstract View of Objects and Subtyping: (preliminary Report). Edinburgh, 1992.

MLA (9th ed.) Citation

Hofmann, Martin, and Benjamin C. Pierce. An Abstract View of Objects and Subtyping: (preliminary Report). 1992.