"Coffee: World Markets and Trade"(PDF). United States Department of Agriculture – Foreign Agricultural Service. June 16, 2017. अभिगमन तिथि December 8, 2017.
ico.org
dev.ico.org
"Botanical Aspects". International Coffee Organization. मूल से 3 October 2011 को पुरालेखित. अभिगमन तिथि 25 August 2011.
"The Story of Coffee". International Coffee Organization. मूल से 3 October 2011 को पुरालेखित. अभिगमन तिथि 25 August 2011.