APA-referens (7:e uppl.)

Langwell, W. H. (1957). The conservation of books and documents. I. Pitman.

Chicago-referens (17:e uppl.)

Langwell, William Herbert. The Conservation of Books and Documents. London: I. Pitman, 1957.

MLA-referens (9:e uppl.)

Langwell, William Herbert. The Conservation of Books and Documents. I. Pitman, 1957.