Lua APA (7ú heag.)

TOWNSEND, C. B. (2002). WORLD'S MOST AMAZING PUZZLES (1st.). ORIENT PAPERBACKS.

Lua i Stíl Chicago (17ú heag.)

TOWNSEND, CHARLES. BARRY. WORLD'S MOST AMAZING PUZZLES. 1st. NEW DELHI: ORIENT PAPERBACKS, 2002.

Lua MLA (9ú heag.)

TOWNSEND, CHARLES. BARRY. WORLD'S MOST AMAZING PUZZLES. 1st. ORIENT PAPERBACKS, 2002.

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