Khera, H. S. (1976). The oil palm industry of Malaysia: An economic study. Kuala Lumpur: Penerbit Universiti Malaya.
शिकागो स्टाइल उद्धरणKhera, Harcharan Singh. The Oil Palm Industry of Malaysia: An Economic Study. Kuala Lumpur: Penerbit Universiti Malaya, 1976.
एमएलए उद्धरणKhera, Harcharan Singh. The Oil Palm Industry of Malaysia: An Economic Study. Kuala Lumpur: Penerbit Universiti Malaya, 1976.
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