Cita APA (7a ed.)

NeXT Computer, Inc. (1992). Nextstep user interface guidelines: Release 3. Addison-Wesley.

Cita Chicago Style (17a ed.)

NeXT Computer, Inc. Nextstep User Interface Guidelines: Release 3. Reading, Massachusetts [etc.]: Addison-Wesley, 1992.

Cita MLA (9a ed.)

NeXT Computer, Inc. Nextstep User Interface Guidelines: Release 3. Addison-Wesley, 1992.