Frank, M. Modern English: A practical reference guide. Englewood Cliffs, N.J: Prentice-Hall.
Trích dẫn kiểu ChicagoFrank, Marcella. Modern English: A Practical Reference Guide. Englewood Cliffs, N.J: Prentice-Hall.
ציטוט MLAFrank, Marcella. Modern English: A Practical Reference Guide. Englewood Cliffs, N.J: Prentice-Hall.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.