APA
BULLOCH JOHN MILLER HENRY, . (1961). SPY RING. LOND: SECKER AND WARDBURG.
Chicago
BULLOCH JOHN MILLER HENRY, . 1961. SPY RING. LOND: SECKER AND WARDBURG.
Harvard
BULLOCH JOHN MILLER HENRY, . (1961). SPY RING. LOND: SECKER AND WARDBURG.
MLA
BULLOCH JOHN MILLER HENRY, . SPY RING. LOND: SECKER AND WARDBURG. 1961.