Style de citation APA

(1982). Memorandum, Casey to President et al., January 20, 1982, Top Secret Ruff Umbra.

Style de citation Chicago

Memorandum, Casey to President Et Al., January 20, 1982, Top Secret Ruff Umbra. 1982.

Style de citation MLA

Memorandum, Casey to President Et Al., January 20, 1982, Top Secret Ruff Umbra. 1982.

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