APA-viite (7. p.)

Graf, B. (2001). Gems: The world's greatest treasures and their stories. Prestel.

Chicago-viite (17. p.)

Graf, Bernhard. Gems: The World's Greatest Treasures and Their Stories. Munich: Prestel, 2001.

MLA-viite (9. p.)

Graf, Bernhard. Gems: The World's Greatest Treasures and Their Stories. Prestel, 2001.

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