APA-referens (7:e uppl.)

Barnard, H. (1906). Pestalozzi and his educational system. C. W. Bardeen.

Chicago-referens (17:e uppl.)

Barnard, Henry. Pestalozzi and His Educational System. Syracuse, N.Y.: C. W. Bardeen, 1906.

MLA-referens (8:e uppl.)

Barnard, Henry. Pestalozzi and His Educational System. C. W. Bardeen, 1906.