APA (7th ed.) Citation

Martin Khor Kok Peng. (1991). Penang Hill: The need to save our natural heritage. Friends of Penang Hill.

Chicago Style (17th ed.) Citation

Martin Khor Kok Peng. Penang Hill: The Need to Save Our Natural Heritage. Penang: Friends of Penang Hill, 1991.

MLA (8th ed.) Citation

Martin Khor Kok Peng. Penang Hill: The Need to Save Our Natural Heritage. Friends of Penang Hill, 1991.

Warning: These citations may not always be 100% accurate.