The DPLA provides free access to a collection of digital resources, including books, images, videos, and historical artifacts.

The LOC has millions of books, manuscripts, photographs, maps, and recordings, making it one of the most extensive libraries in the world.

Digital Commonwealth provides online access to a diverse range of cultural heritage materials from various Massachusetts institutions, preserving and sharing the state's history.

The National Archives online collections provide a comprehensive and accessible digital repository of historically significant documents, photographs, and records.

Europeana contains millions of digitized artworks, artifacts, and cultural treasures from European museums, libraries, and archives.

The UK National Archives offers an extensive array of digitized historical records, government documents, and multimedia resources.

The British Library website serves as a vast digital repository of knowledge, featuring an impressive array of books, manuscripts, maps, and multimedia materials.

The Archives Portal Europe website serves as a centralized gateway to access a wide range of archival materials and historical records from various European countries.

You can use EasyBib to help create your citations.

You can use Citation Machine to help create your citations.