APA (7th ed.) Citation

Gordon, R., & Williams, B.. (2008). Tunnels. PTS Litera Utama Sdn. Bhd..

Chicago Style (17th ed.) Citation

Gordon, Roderick, and Brian Williams. Tunnels. Kuala Lumpur: PTS Litera Utama Sdn. Bhd., 2008.

MLA (9th ed.) Citation

Gordon, Roderick, and Brian Williams. Tunnels. PTS Litera Utama Sdn. Bhd., 2008.

Warning: These citations may not always be 100% accurate.