Hofer, H. (1991). Insight guides: Singapore. APA Pub.
Lua i Stíl Chicago (17ú heag.)Hofer, Hans. Insight Guides: Singapore. Singapore: APA Pub, 1991.
Lua MLA (9ú heag.)Hofer, Hans. Insight Guides: Singapore. APA Pub, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.