Selby, N. (1987). Essential college english: A grammar and puntuation workbook (2ª ed.). Norwood Selby.
Chicago (17e ed.) BronvermeldingSelby, Norwood. Essential College English: A Grammar and Puntuation Workbook. 2ª ed. Norwood Selby, 1987.
MLA (9e ed.) BronvermeldingSelby, Norwood. Essential College English: A Grammar and Puntuation Workbook. 2ª ed. Norwood Selby, 1987.
Let op: Deze citaties zijn niet altijd 100% accuraat.