APA-referens (7:e uppl.)

Teilhard de Chardin, P. (1973). On happiness ([1st U.S. ed.].). Harper & Row.

Chicago-referens (17:e uppl.)

Teilhard de Chardin, Pierre. On Happiness. [1st U.S. ed.]. New York: Harper & Row, 1973.

MLA-referens (8:e uppl.)

Teilhard de Chardin, Pierre. On Happiness. [1st U.S. ed.]. Harper & Row, 1973.