Cita APA (7a ed.)

Letwin, G., & Gates, B. (1988). Inside OS-2. Microsoft.

Cita Chicago Style (17a ed.)

Letwin, Gordon, y Bill Gates. Inside OS-2. Redmond: Microsoft, 1988.

Cita MLA (9a ed.)

Letwin, Gordon, y Bill Gates. Inside OS-2. Microsoft, 1988.