KNIGHTLEY P. (1980). PHILBY - THE SPY WHO BETRAYED A GENERATION. SPHERE BOOKS LTD.
Lua i Stíl Chicago (17ú heag.)KNIGHTLEY P. PHILBY - THE SPY WHO BETRAYED A GENERATION. LONDON: SPHERE BOOKS LTD, 1980.
Lua MLA (9ú heag.)KNIGHTLEY P. PHILBY - THE SPY WHO BETRAYED A GENERATION. SPHERE BOOKS LTD, 1980.
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