Não informado. NASA Classification Change Notices. National Aeronautics and Space Administration.
Chicagoスタイル(17版)引用形式Não informado. NASA Classification Change Notices. Washington: National Aeronautics and Space Administration.
MLA(8版)引用形式Não informado. NASA Classification Change Notices. National Aeronautics and Space Administration.
警告: この引用は必ずしも正確ではありません.