Lua APA (7ú heag.)

Não informado. (1961). APL Technical Digest. Johns Hopkins University, Applied Physics Laboratory.

Lua i Stíl Chicago (17ú heag.)

Não informado. APL Technical Digest. Silver Spring, Md: Johns Hopkins University, Applied Physics Laboratory, 1961.

Lua MLA (8ú heag.)

Não informado. APL Technical Digest. Johns Hopkins University, Applied Physics Laboratory, 1961.

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