Cita APA (7th ed.)

Jorgensen, C., & Guy, A. (1988). Mastering 1-2-3 (2nd ed.). Sybex.

Cita Chicago (17th ed.)

Jorgensen, Carolyn, i Aisling Guy. Mastering 1-2-3. 2nd ed. San Fransisco, USA: Sybex, 1988.

Cita MLA (9th ed.)

Jorgensen, Carolyn, i Aisling Guy. Mastering 1-2-3. 2nd ed. Sybex, 1988.