Bull, W. J. (1991). Precast Concrete Raft Units. Blackie.
Chicago Style aipamenaBull, W. John. Precast Concrete Raft Units. Glasgow: Blackie, 1991.
MLA aipamenaBull, W. John. Precast Concrete Raft Units. Blackie, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.