Lua APA (7ú heag.)

Schell, E. H. Technique Of Executive Control Erwin Haskell Schell. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Schell, Erwin Haskell. Technique Of Executive Control Erwin Haskell Schell. McGraw-Hill.

Lua MLA (8ú heag.)

Schell, Erwin Haskell. Technique Of Executive Control Erwin Haskell Schell. McGraw-Hill.

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