Citazione Stile APA (7a Edizione)

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.

Citazione stile Chigago Style (17a edizione)

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.

Citatione MLA (9a ed.)

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.