Heberle, D. (1998). Construction safety manual. New York: McGraw-Hill.
Chicago Style aipamenaHeberle, Dave. Construction Safety Manual. New York: McGraw-Hill, 1998.
MLA aipamenaHeberle, Dave. Construction Safety Manual. New York: McGraw-Hill, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.