Style de citation APA

(1951). Memorandum, Armstrong to The Secretary, August 9, 1951, Top Secret.

Style de citation Chicago

Memorandum, Armstrong to The Secretary, August 9, 1951, Top Secret. 1951.

Style de citation MLA

Memorandum, Armstrong to The Secretary, August 9, 1951, Top Secret. 1951.

Attention : ces citations peuvent ne pas être correctes à 100%.