APA引文

Freedman, R. (2012). Abraham Lincoln and Frederick Douglass: The story behind an American friendship. Houghton Mifflin Harcourt/Clarion Books.

Chicago Style (17th ed.) Citation

Freedman, Russell. Abraham Lincoln and Frederick Douglass: The Story Behind an American Friendship. Boston: Houghton Mifflin Harcourt/Clarion Books, 2012.

MLA引文

Freedman, Russell. Abraham Lincoln and Frederick Douglass: The Story Behind an American Friendship. Houghton Mifflin Harcourt/Clarion Books, 2012.

警告：這些引文格式不一定是100％准確.