Purnomo Wahyu Susilo (2010) An Analysis of Some Grammatical Mistakes in Writing III of The Students of Diploma III English Department of Airlangga University. Skripsi thesis, UNIVERSITAS AIRLANGGA.

Kartika Rahmawati (2008) A Brief Study of Grammatical Errors in Writing Iv Made By D3 Students of The English Department of Airlangga University. Skripsi thesis, UNIVERSITAS AIRLANGGA.

Mira Intansari (2010) Implicit Meaning Used in Paulo Coelho’s The Alchemist and Its Translation. Skripsi thesis, UNIVERSITAS AIRLANGGA.