1. Ang, S. H. (2012). Developments in the geography syllabuses in Singapore. Northstar, 2(3), 1–14.
2. Ang, S. H., Yee, S. O. & Loh, C. (1985). Geography through fieldwork. Book 1. Curriculum Branch.
3. Ang, S. H., Yee, S. O. & Loh, C. (1986). Geography through fieldwork. Book 3. Curriculum Branch.
4. Bland, K., Chambers, B., Donert, K., & Thomas, T. (1996). Fieldwork, geography teachers’ handbook. In P. Bailey & P. Fox, (Eds.), Geographical association. (pp. 165–176).
5. Boardman, D., & McPartland, M. (1993). From regions to models: 1944–69. Teaching Geography, 18(2), 65–69.