Whyman, K. (1985). FORCES - IN ACTION -. Aladdin Books Ltd.
Lua i Stíl Chicago (17ú heag.)Whyman, Kathryn. FORCES - IN ACTION -. Aladdin Books Ltd, 1985.
Lua MLA (8ú heag.)Whyman, Kathryn. FORCES - IN ACTION -. Aladdin Books Ltd, 1985.
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