Gaya APA

Arens, A, A. et al (2003). Auditing and assurance services an integrated approach (9th ed). Upper Saddle River, NJ: Prentice Hall.

Gaya MLA

Arens, Alvin, A.. et al. "Auditing and assurance services an integrated approach". 9th ed Upper Saddle River, NJ: Prentice Hall, 2003. Text.