Tham khảo Lan_can

    • Ching, Francis D. K. (1995). A Visual Dictionary of Architecture. Van Nostrand Reinhold Company, ISBN 0-442-02462-2. p. 266
    • George Orwell 1952, Homage to Catalonia; cf. Chap VII.
    • A New and Enlarged Military Dictionary, Charles James, Egerton Military Library 1810.
    • Chisholm, Hugh, ed (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.