Chin, C. H., Dobie, M. J. D., & Nicholls, R. A. (1990). Geotechnical aspects of the North-South Expressway. Kuala Lumpur : Projek Lebuhraya Utara-Selatan (PLUS) and Pengurusan Lebuhraya Berhad (PL).
Lua i Stíl Chicago (17ú heag.)Chin, C. H., M. J. D. Dobie, agus R. A. Nicholls. Geotechnical Aspects of the North-South Expressway. Kuala Lumpur : Projek Lebuhraya Utara-Selatan (PLUS) and Pengurusan Lebuhraya Berhad (PL), 1990.
Lua MLA (9ú heag.)Chin, C. H., et al. Geotechnical Aspects of the North-South Expressway. Kuala Lumpur : Projek Lebuhraya Utara-Selatan (PLUS) and Pengurusan Lebuhraya Berhad (PL), 1990.
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