Singh, Saran, The Encyclopaedia of the Coins of Malaysia, Singapore and Brunei (1400-1986), First Edition, Kuala Lumpur, Malaysia: Malaysia Numismatic Society, 1986, pp675 (inc illustrations) and pp58 (price guide). Sold!
In my opinion, this large hardcover book is the most authoritative and comprehensive catalog written about the coins of Brunei, Malaysia, and Singapore. I'd bought this book in the late 1980s from a good friend who'd used to run a numismatic shop downtown.
In September of 1980, before this catalog was published, I had a chance to meet the author, a very knowledgeable numismatist who was then the Honorary Secretary of Malaysia Numismatic Society, at a coin shop inside Lucky Plaza at Orchard Road. We shook hands and talked about coin and paper money collecting for about 30 minutes.