Tianwan, G. (1987). A Practical Guide To Export Import & Banking Goh Tianwan. Singapore Rank Books 1987.
Lua i Stíl Chicago (17ú heag.)Tianwan, Goh. A Practical Guide To Export Import & Banking Goh Tianwan. Singapore Rank Books 1987, 1987.
Lua MLA (8ú heag.)Tianwan, Goh. A Practical Guide To Export Import & Banking Goh Tianwan. Singapore Rank Books 1987, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.