Bekkering, B., & Bekkering, G. (1988). Piece by Piece: A History of the Jig-saw Puzzle in the Netherlands. Van Soeren und Co..
Chicago-Zitierstil (17. Ausg.)Bekkering, Betsy, und Geert Bekkering. Piece by Piece: A History of the Jig-saw Puzzle in the Netherlands. Amsterdam: Van Soeren und Co., 1988.
MLA-Zitierstil (8. Ausg.)Bekkering, Betsy, und Geert Bekkering. Piece by Piece: A History of the Jig-saw Puzzle in the Netherlands. Van Soeren und Co., 1988.
警告：這些引文格式不一定是100％准確.