APA (7th ed.) Zitazioa
Duggal, S. (2018). Building materials (4th ed.). New Age International.
Chicago Style (17th ed.) Zitazioa
Duggal, S.K. Building Materials. 4th ed. Kolkata: New Age International, 2018.
MLA (9th ed.) Zitazioa
Duggal, S.K. Building Materials. 4th ed. New Age International, 2018.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.