Carlsen, G. R., Tovatt, A., & Tovatt, P. O. (1969). Focus: Themes in literature. Webster Division, McGraw-Hill.
芝加哥风格引文Carlsen, G. Robert, Anthony Tovatt, 与 Patricia O. Tovatt. Focus: Themes in Literature. New York: Webster Division, McGraw-Hill, 1969.
MLA引文Carlsen, G. Robert, et al. Focus: Themes in Literature. Webster Division, McGraw-Hill, 1969.
警告：这些引文格式不一定是100％准确.