APA (7th ed.) Citation

Langwell, W. H., & Barraclough, G. (1974). The conservation of books and documents. Greenwood Press.

Chicago Style (17th ed.) Citation

Langwell, William Herbert, and G. Barraclough. The Conservation of Books and Documents. Westport, Conn.: Greenwood Press, 1974.

MLA (9th ed.) Citation

Langwell, William Herbert, and G. Barraclough. The Conservation of Books and Documents. Greenwood Press, 1974.