The Lock by John Constable (Sale London, Sotheby's, 14.11.1990).

MLA

The Lock by John Constable (sale London, Sotheby's, 14.11.1990). London: Sotheby's, 1990.

APA

(1990). The Lock by John Constable (Sale London, Sotheby's, 14.11.1990). London: Sotheby's.

Chicago

The Lock by John Constable (sale London, Sotheby's, 14.11.1990). London: Sotheby's, 1990.