APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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