Cita APA (7a ed.)

Liskov, B., & Guttag, J. (1986). Abstraction and specification in program development. MIT.

Cita Chicago Style (17a ed.)

Liskov, Barbara, y John Guttag. Abstraction and Specification in Program Development. Cambridge: MIT, 1986.

Cita MLA (8a ed.)

Liskov, Barbara, y John Guttag. Abstraction and Specification in Program Development. MIT, 1986.