Osbourn, D. (1997). Introduction to building (2nd ed.). Longman.
Cita Chicago (17th ed.)Osbourn, Derek. Introduction to Building. 2nd ed. Harlow, Essex: Longman, 1997.
Cita MLA (9th ed.)Osbourn, Derek. Introduction to Building. 2nd ed. Longman, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.