Παραπομπή σε μορφή APA (7η εκδ.)

Liu, G., & Houlsby, G. (1997). Numerical modelling of damage to masonry buildings due to tunnelling.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Liu, G., και G. Houlsby. Numerical Modelling of Damage to Masonry Buildings Due to Tunnelling. 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Liu, G., και G. Houlsby. Numerical Modelling of Damage to Masonry Buildings Due to Tunnelling. 1997.