Porter, D., & Prince, D. (2009). Frommer's Norway (4th ed.). Wiley.
芝加哥风格引文Porter, Darwin, 与 Danforth Prince. Frommer's Norway. 4th ed. New York: Wiley, 2009.
MLA引文Porter, Darwin, 与 Danforth Prince. Frommer's Norway. 4th ed. Wiley, 2009.
警告：这些引文格式不一定是100％准确.