Osborne, M. P., & Murdocca, S. (1998). Polar bears past bedtime. Random House.
芝加哥风格引文Osborne, Mary Pope, 与 Sal Murdocca. Polar Bears Past Bedtime. New York: Random House, 1998.
MLA引文Osborne, Mary Pope, 与 Sal Murdocca. Polar Bears Past Bedtime. Random House, 1998.
警告：这些引文格式不一定是100％准确.