Islam, M. R., & Khan, M. I. (2007). Act prep plus 2019: 5 practice tests + proven strategies + online. Gulf Publishing Comany.
Citazione stile Chigago Style (17a edizione)Islam, M R., e M I67137 Khan. Act Prep Plus 2019: 5 Practice Tests + Proven Strategies + Online. Texas: Gulf Publishing Comany, 2007.
Citatione MLA (9a ed.)Islam, M R., e M I67137 Khan. Act Prep Plus 2019: 5 Practice Tests + Proven Strategies + Online. Gulf Publishing Comany, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.