APA-referens (7:e uppl.)

Pickering, G. W. (1967). The challenge to education. Watts.

Chicago-referens (17:e uppl.)

Pickering, George White. The Challenge to Education. London: Watts, 1967.

MLA-referens (8:e uppl.)

Pickering, George White. The Challenge to Education. Watts, 1967.