Heatley, M., & Salter, C. (2012). Everything you need to know about everything you need to know about inventions. Portico Books.
Citace podle Chicago (17th ed.)Heatley, MIchael, a Colin Salter. Everything You Need to Know About Everything You Need to Know About Inventions. United Kingdom: Portico Books, 2012.
Citace podle MLA (9th ed.)Heatley, MIchael, a Colin Salter. Everything You Need to Know About Everything You Need to Know About Inventions. Portico Books, 2012.
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