Cita APA

Allen, A. H., & Allen, A. H. (1978). An introduction to prestressed concrete. London, Sydney: Cement and Concrete Association.

Citación estilo Chicago

Allen, A. H., y A. H. Allen. An Introduction to Prestressed Concrete. London, Sydney: Cement and Concrete Association, 1978.

Cita MLA

Allen, A. H., y A. H. Allen. An Introduction to Prestressed Concrete. London, Sydney: Cement and Concrete Association, 1978.