Ingham, F. T., & Bradford, E. F. The geology and mineral resources of the Kinta Valley, Perak. Federation of Malaya, Geological Survey.
Chicago-viite (17. p.)Ingham, Frank Tinley, ja Ernest Frederick Bradford. The Geology and Mineral Resources of the Kinta Valley, Perak. Kuala Lumpur: Federation of Malaya, Geological Survey.
MLA-viite (8. p.)Ingham, Frank Tinley, ja Ernest Frederick Bradford. The Geology and Mineral Resources of the Kinta Valley, Perak. Federation of Malaya, Geological Survey.
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