Köhlmyr, P. (2003). "To err is human...": An investigation of grammatical errors in Swedish 16-year-old learners' written production in English. Göteborg University Departament of English.
Чикаго стиль цитування (17-те видання)Köhlmyr, Pia. "To Err Is Human...": An Investigation of Grammatical Errors in Swedish 16-year-old Learners' Written Production in English. Göteborg: Göteborg University Departament of English, 2003.
Стиль цитування MLA (9-ме видання)Köhlmyr, Pia. "To Err Is Human...": An Investigation of Grammatical Errors in Swedish 16-year-old Learners' Written Production in English. Göteborg University Departament of English, 2003.
Попередження: стилі цитування не завжди правильні на всі 100%.