APA引文

Unruh GC. (2010). Earth, Inc. Harvard Bus.School.Pub.

芝加哥风格引文

Unruh GC. Earth, Inc. Boston: Harvard Bus.School.Pub, 2010.

MLA引文

Unruh GC. Earth, Inc. Harvard Bus.School.Pub, 2010.

警告：这些引文格式不一定是100％准确.