Bowman, S. Twayne's United States authors series. Twayne.
Chicago-Zitierstil (17. Ausg.)Bowman, Sylvia. Twayne's United States Authors Series. Boston: Twayne.
MLA-Zitierstil (8. Ausg.)Bowman, Sylvia. Twayne's United States Authors Series. Twayne.
警告：這些引文格式不一定是100％准確.