Gaya APA

AC 60-28 - English Language Skill Standards required by 14 CFR Parts 61, 63 and 65. (2017). : FEDERAL AVIATION ADMINISTRAION.

Gaya MLA

AC 60-28 - English Language Skill Standards required by 14 CFR Parts 61, 63 and 65. . : FEDERAL AVIATION ADMINISTRAION, 2017. Text.