acro-. (n.d.). In Greek, Acropolis means "Highest City". The American Heritage Dictionary of the English Language, Fourth Edition. Retrieved September 29, 2008, from Dictionary.com website:เก็บถาวร 2016-03-04 ที่ เวย์แบ็กแมชชีน Quote: "[From Greek akros, extreme; see ak- in Indo-European roots.]"
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acro-. (n.d.). In Greek, Acropolis means "Highest City". The American Heritage Dictionary of the English Language, Fourth Edition. Retrieved September 29, 2008, from Dictionary.com website:เก็บถาวร 2016-03-04 ที่ เวย์แบ็กแมชชีน Quote: "[From Greek akros, extreme; see ak- in Indo-European roots.]"