Cita APA (7a ed.)

Goldberg, A., & Robson, D. (1990). Smalltalk-80: The language and its implementation. Digital Press.

Cita Chicago Style (17a ed.)

Goldberg, Adele, y David Robson. Smalltalk-80: The Language and Its Implementation. Massachusetts: Digital Press, 1990.

Cita MLA (8a ed.)

Goldberg, Adele, y David Robson. Smalltalk-80: The Language and Its Implementation. Digital Press, 1990.