5
Resources share the relationship provider place to Singapore
- Child's Play International Ltd., Singapore, 1996, c1984
- distributed by Poh Kim Video Pte Ltd, Singapore
- Tuttle Publishing, Tokyo, Rutland, Vermont, Singapore, 2019
- Tuttle Publishing, Tokyo, Rutland, Vermont, Singapore, 2013
- Imperial College Press, Distributed by World Scientific Pub., London, Singapore, Hackensack, NJ, c2011