Cita APA (7th ed.)

Shellman, M., Afyouni, H., Prat, P. J., & Last, M. Z. (2021). A guide to SQL (Tenth edition.). Cengage Learning.

Cita Chicago (17th ed.)

Shellman, Mark, Hassan Afyouni, Philip J. Prat, i Mary Z. Last. A Guide to SQL. Tenth edition. Boston: Cengage Learning, 2021.

Cita MLA (9th ed.)

Shellman, Mark, et al. A Guide to SQL. Tenth edition. Cengage Learning, 2021.