Lua APA (7ú heag.)

LAUDICINA PAUL A. (2005). WORLD OUT OF BALANCE. MCGRAW-HILL.

Lua i Stíl Chicago (17ú heag.)

LAUDICINA PAUL A. WORLD OUT OF BALANCE. NEW YORK: MCGRAW-HILL, 2005.

Lua MLA (9ú heag.)

LAUDICINA PAUL A. WORLD OUT OF BALANCE. MCGRAW-HILL, 2005.

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