Visa types (English) from the Ministery of Foreign Affairs
Immigration Act (In English)
The new visa rules - Nov. 2008 for foreigners (English) Immigration bureau
The new visa rules - Nov. 2008 for foreigners (Thai) Immigration bureau
Working of Aliens Act (1978) (English)
Work Permits - Restrictions of working in Thailand (English) (Tilleke Gibbins - 2002)
Work Permits (English - thailandlegal.com)
Another text on Work Permits (English)
Work Permits in Thailand (English) (BIA - December 2006)
Royal Decree - Prohibited work and professions (1979) (English - NOT updated)
Visa Fees (English) Immigration bureau
Nationality Act (English)
Permanent residency requirements (English) December 2003
Persons not permitted to enter the kingdom (English)
Documents needed to apply for a passport for a Thai person (English)