Singapore. Ministry of Trade and Industry & Singapore Tourist Promotion Board. (1986). Tourism product development plan. The Ministry.
Chicago-Zitierstil (17. Ausg.)Singapore. Ministry of Trade and Industry und Singapore Tourist Promotion Board. Tourism Product Development Plan. [Singapore: The Ministry, 1986.
MLA-Zitierstil (9. Ausg.)Singapore. Ministry of Trade and Industry und Singapore Tourist Promotion Board. Tourism Product Development Plan. The Ministry, 1986.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.