Directory Services, Inc. The DSI color slides: The collectors' series. Directory Services, Inc.
Chicago Style (17th ed.) CitationDirectory Services, Inc. The DSI Color Slides: The Collectors' Series. Minneapolis, Minn.: Directory Services, Inc.
MLA (8th ed.) CitationDirectory Services, Inc. The DSI Color Slides: The Collectors' Series. Directory Services, Inc.
Warning: These citations may not always be 100% accurate.