(美)凯莱布·埃弗里特(CalebEverett)著. (2018). 数字起源：counting and the course of human cultures. 中信出版集团股份有限公司.
Dyfyniad Arddull Chicago(美)凯莱布·埃弗里特(CalebEverett)著. 数字起源：counting and the Course of Human Cultures. 中信出版集团股份有限公司, 2018.
Dyfyniad MLA(美)凯莱布·埃弗里特(CalebEverett)著. 数字起源：counting and the Course of Human Cultures. 中信出版集团股份有限公司, 2018.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.