Lua APA (7ú heag.)

VIGNAULT, W. L. (1987). Worldwide Telecommunications Guide For The Business Manager Walter L. Vignault. John Wiley & Sons.

Lua i Stíl Chicago (17ú heag.)

VIGNAULT, Walter L. Worldwide Telecommunications Guide For The Business Manager Walter L. Vignault. John Wiley & Sons, 1987.

Lua MLA (8ú heag.)

VIGNAULT, Walter L. Worldwide Telecommunications Guide For The Business Manager Walter L. Vignault. John Wiley & Sons, 1987.

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