Cita APA (7a ed.)

Baker, S., & DeGroot, A. (1930). Concrete engineer's manual . A convenient reference book.

Cita Chicago Style (17a ed.)

Baker, Samuel, y A. DeGroot. Concrete Engineer's Manual . A Convenient Reference Book. Scranton, Pa., International textbook company, 1930.

Cita MLA (9a ed.)

Baker, Samuel, y A. DeGroot. Concrete Engineer's Manual . A Convenient Reference Book. 1930.