Cita APA (7th ed.)

Hoare, C., Jifeng, H., & Friesen, O. (1987). Design and Proof of a Mail Service.

Cita Chicago (17th ed.)

Hoare, C., H. Jifeng, i O. Friesen. Design and Proof of a Mail Service. 1987.

Cita MLA (9th ed.)

Hoare, C., et al. Design and Proof of a Mail Service. 1987.