Cita APA (7a ed.)

Walford, A. (1966). Guide to reference material: 1, Science and technology. Library Association.

Cita Chicago Style (17a ed.)

Walford, A.J. Guide to Reference Material: 1, Science and Technology. London: Library Association, 1966.

Cita MLA (9a ed.)

Walford, A.J. Guide to Reference Material: 1, Science and Technology. Library Association, 1966.