Cita APA (7a ed.)

Liskov, B., & Guttag, J. (1987). Abstraction and specification in program development. MIT [etc.].

Cita Chicago Style (17a ed.)

Liskov, Barbara, y John Guttag. Abstraction and Specification in Program Development. Cambridge (Massachusetts) [etc.]: MIT [etc.], 1987.

Cita MLA (9a ed.)

Liskov, Barbara, y John Guttag. Abstraction and Specification in Program Development. MIT [etc.], 1987.