American Gas Association. (1969). Gas engineers handbook: Fuel gas engineering practices. Industrial Press.
Chicago Style aipamenaAmerican Gas Association. Gas Engineers Handbook: Fuel Gas Engineering Practices. New York: Industrial Press, 1969.
MLA aipamenaAmerican Gas Association. Gas Engineers Handbook: Fuel Gas Engineering Practices. Industrial Press, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.