Sukur, S. G. (2016). TOEFL Grammar Guide Book For Beginners 2. Indonesia Cerdas.
Lua i Stíl Chicago (17ú heag.)Sukur, Silvester Goridus. TOEFL Grammar Guide Book For Beginners 2. Indonesia Cerdas, 2016.
Lua MLA (8ú heag.)Sukur, Silvester Goridus. TOEFL Grammar Guide Book For Beginners 2. Indonesia Cerdas, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.