APA (7th ed.) Citation

HoarelhC.A.R. & He. Unifying theories of programming.

Chicago Style (17th ed.) Citation

HoarelhC.A.R. and He. Unifying Theories of Programming. LondonlbPrentice halllc1998.

MLA (9th ed.) Citation

HoarelhC.A.R. and He. Unifying Theories of Programming.

Warning: These citations may not always be 100% accurate.